KR100548987B1 - Self oil providing system having cash accept processing function and cash accept processing method - Google Patents

Abstract

The present invention relates to a self-lubrication system having a cash storage processing function and a cash storage processing method in a self-fueling system, wherein the fueling amount is approved when the fueling amount is settled by the use of various financial cards or by recognizing the cashing right. If necessary, according to the fueling start command of the POS system, a user can directly supply fuel by using a nozzle gun as much as the storage amount, and connect the plurality of self-fuelers and cash storage devices with a LAN or a communication line. Perform a settlement function and a management function in each self-lubricator, store data on the input amount transferred from the cash dispenser in the DB, generate a barcode consisting of the input amount and the issue number, Together with the cash receiver, the fuel oil recognized in the self-lubricator POS system that receives the barcode of the system and checks the input amount and balance stored in the DB through the issue unique number in the barcode, and sends the fueling start command according to the self-lubrication approval to the self-lubricator if the balance exists, and corrects the balance information of the DB. And a financial institution such as a card company, a bank, etc., which is connected to the POS system through a VAN and a communication line, and performs card approval of the POS system, and recognizes a banknote input by the user and displays data on the input amount of the POS system. It is characterized in that it is configured to receive a bar code of the input amount and issuance unique number and the cash gas ticket issuance form from the POS system, and a cash receiver for issuing a cash lubrication ticket printed with a barcode equal to the amount of money inputted.

Self-lubricator, cash register, POS system, cash gas ticket, barcode

Description

SELF OIL PROVIDING SYSTEM HAVING CASH ACCEPT PROCESSING FUNCTION AND CASH ACCEPT PROCESSING METHOD}

1 is a block diagram of a self-lubrication system consisting of a plurality of self-lubricator with a conventional cash receiver.

Figure 2 is a block diagram of a self-fueling system having a cash storage processing function according to the present invention.

3 is a detailed block diagram of a cash receiver according to the present invention;

4 is an external configuration diagram of a cash receiver according to the present invention;

5 is a detailed block diagram of a self-lubricator according to the present invention.

6 is an external configuration diagram of a self-lubricator according to the present invention.

7 is a flowchart illustrating an operation of issuing a gasoline ticket between an ATM and a POS system according to the present invention.

Figure 8 is a flow chart showing the operation of refueling and refueling and balance management between the self-lubricator and the POS system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10-1 to N: Self-lubricator 1 to N 11: Banknote input and recognition unit

12: fuel issuing button 13: amount display unit

14: oil ownership issuance unit 15: communication unit

16: control unit 20: POS system

30: financial institution 40: cash storage

41: ticket recognition unit 42: card recognition unit

43,44: 1st, 2nd display part 45: Oiling apparatus part

46: receipt issuing unit 47: voice output unit

48: communication unit 49: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-lubrication system having a cash storage processing function and a cash storage processing method in a self-fueling system. Particularly, in a self-fueling system of a gas station and other gas stations, it is possible to replace the cash storage machine provided in each self-lubricator. It is equipped with only one cash depositor for issuing a cash gas ticket printed with a bar code, and recognizes the gas ticket issued by the cash storage machine through each self-lubricator, and allows the oil to be charged as much as the cash storage amount, and POS (Point Of Sales) In the self-lubrication system and self-lubrication system with a cash receipt processing function that automatically manages the difference between the cash receipt amount and the actual lubrication amount, as all data of the cash receipt process are stored in the DB (Data Base) through the system. It relates to a cash storage processing method of.

1 is a block diagram of a conventional self-lubrication system, a large number of self-lubricators 1 to N (1-1 to N) to allow the user to directly fuel the fuel amount is largely paid by the use of cash or card, and This self-lubricator is connected through 1 ~ N (1-1 ~ N) and LAN (Local Area Network) to settle the amount of fuel in each self-lubricator, and to manage the user information A financial institution such as a card company, a bank, etc., which is connected to the POS system 2 for performing a credit card system and performs a card approval of the POS system 2 by connecting the POS system 2 with a value added network (VAN) and a communication line ( 3) consists of.

Each of the self-lubricators 1 to N (1-1 to N) includes a cash receiver for recognizing banknotes, and when the user recognizes a banknote inserted by the user, a cash storing amount set according to the fueling start command of the POS system 2. As long as lubrication is started, the nozzle gun is used to start lubrication.

However, in the related art, as the cash storage device is provided for each self-lubricator as described above, an excessive installation cost is generated, and various operations such as banknote recognition, cash storage, and oiling are all performed in one self-lubricator. The structure is made complicated, and there is a disadvantage that problems such as mechanical defects occur due to this complex structure.

In addition, in the case of the gas station manager, there are inconveniences of collecting bills from each cash dispenser in each self-fuel machine, as well as disadvantages such as the inability to refuel in the self-fuel machine at the time of collecting bills.

In addition, when the user is unable to refuel any more when the fuel tank of the car is full during self-fueling, a difference between the cash storage amount and the actual fueling amount, that is, a refund problem occurs. Self-lubricator equipped with a balance management function is not implemented at all.

Therefore, in order to receive the refund of the balance, the user must visit the gas station office and receive the refund after checking the cash storage amount and the actual fueling amount. Therefore, the balance settlement and refund procedure for both the user and the manager is very cumbersome and inconvenient. At this time, since the use of the self-lubricator is stopped until the balance refund is made, other users cannot use the self-lubricator. In particular, there is no way to get a refund of the balance if the office manager is absent or at an unattended self-service station.

Due to the above problems and disadvantages, it is possible to confirm that the conventional self-lubrication system loses the function of true self-lubrication.

The present invention has been made to solve the above problems, the purpose of the self-lubrication system of gas stations and other gas stations, as long as issuing a cash gas ticket printed with a bar code in place of the cash receiver provided in each self-lubricator It is possible to significantly reduce the cost of installing the existing cash storage device by providing only cash storage devices and allowing each fueling machine to recognize the gas ticket issued by the cash storage device through each self-lubrication machine. To provide a self-lubrication system and a cash storage processing method in the self-lubrication system that can simplify the internal structure of the lubricator and has a cash storage processing function to allow self-lubrication in the self-lubricator regardless of the operation of the cash storage device. There is.

In addition, as all data of the cash storage process is stored in the DB through the POS system, a balance management function can be used to automatically manage the difference between the cash storage amount and the actual fuel amount. Provides a self-fueling system with a cash dispense function that provides users and managers with the convenience and reliability of a gas station, such as no need to go to a gas station office, and a cash dispense method in a self-fuel system. It's there.

The self-lubrication system with a cash receipt processing function of the present invention for achieving the above object is a POS system when the fuel amount is settled by the use of various financial cards, or when the fuel amount is recognized by recognizing the cash gas ticket. A plurality of self-lubricators and a plurality of self-lubricator to enable fueling by the user directly using the nozzle gun in accordance with the fueling start command of the user, connected to the plurality of self-lubricator and cash storage device through a LAN or communication line, each self Perform the settlement function and management function in the gas tanker, store the data about the input amount transferred from the cash acceptor in the DB, generate a bar code consisting of the input amount and the issue number, the cash acceptor together with the form of issuing the cash gas ticket And the barcode of the cash gas ticket recognized by the self-lubricator is received. POS system for retrieving the input amount and balance stored in the DB through the unique number in the code and transmitting the fueling start command according to the self-lubrication approval to the self-lubricator when the balance exists, and modifying the balance information of the DB, and the POS system Connected to the bank through a VAN and a communication line, and recognizes banknotes, such as card companies and banks that perform card approval of the POS system, and transmits data on the input amount to the POS system, It is characterized by consisting of a cash receiver for issuing a cash flow ticket with the amount of the barcode inputted by receiving a barcode of the input amount and issuance unique number and the cash gas ticket issuance form from the POS system.

The cash receipt processing method of the self-lubrication system of the present invention includes a cash gas ticket issuing process of recognizing a banknote inserted by a user in a cash dispenser and issuing a cash gas ticket printed with a barcode equal to the amount of money inputted, and issuing the cash gas ticket. The cash gas ticket issued during the process is inserted and recognized in the self-lubricator to check the normal existence and balance of the cash gas ticket from the POS system, and if the balance exists, the cash gas ticket inquiry to allow the user to fill the balance of the cash gas ticket in the corresponding self-lubricator. When the fueling process and the fueling inquiries and the fueling in the fueling process is completed, the price data actually lubricated by the user in the self-lubricator is transmitted to the POS system, the difference between the cash amount and the actual oiling amount in the POS system If you have a balance to calculate cash passes Modifying the balance information stored in the DB, and is characterized in that comprising a balance management, and receipt issuing process for issuing the receipt at the self lubricator.

Hereinafter, with reference to the accompanying drawings will be described in detail the self-lubrication system with a cash storage processing function and the cash storage processing method in a self-fueling system according to the present invention.

2 is a block diagram of a self-lubrication system having a cash storage processing function according to the present invention, which includes a plurality of self-lubricators 1 to N (10-1 to N) that do not have large cash storage devices, and a plurality of self-lubrication systems. POS system 20 performing settlement and management functions of lubricators 1 to N (10-1 to N), and the POS system 20 is connected to the POS system 20 through a VAN and a communication line to approve the card of the POS system 20. It consists of a financial institution 30, such as a card company, a bank, and the like, and a cash acceptor 40 for issuing cash refill right.

The plurality of self-lubricators 1 to N (10 to 1 to N) are used when the fuel amount is settled by the use of a corresponding financial card such as a credit card or a debit card, or when the fuel amount is approved by recognizing a cash gas ticket. According to the fueling start command of (20), the user himself can use the nozzle gun to refuel as much as the stored amount.

The plurality of self-lubricators 1 to N (10-1 to N) and the POS system 20 connected to the cash acceptor 40 through a LAN or a communication line may be used to set a fuel supply amount, oil supply amount, fuel supply amount, etc. in each self-lubricator. Settlement function and management function of user information should be performed.

Then, the data about the input amount transmitted from the cash acceptor 40 is stored in the DB, and a barcode consisting of the input amount and the issue unique number is generated and transmitted to the cash acceptor 40 together with the form for issuing the cash gas ticket. Receive the bar code of the cash lubrication ticket recognized by the self-lubricator 1 to N (10-1 to N) and search the input amount and balance stored in the DB through the issue number in the bar code to fill the fuel according to the self-lubrication in the presence of the balance. The start command is sent to the self-lubricators 1 to N (10-1 to N), and the balance information of the DB is corrected.

The cash acceptor 40 recognizes cash input by the user, that is, bills, and issues cash lubrication tickets for the amount of money put under the control of the POS system 20.

That is, FIG. 3 is a detailed block diagram of the cash acceptor 40. As shown in FIG. 3, a banknote input and recognition unit 11 for inserting a banknote that is cash, and recognizing the inserted banknote, and issuing a cash lubrication ticket is issued. The gas ticket issuing button 12, which is pressed for the purpose, an amount of money display unit 13 for displaying the amount of money recognized by the banknote input and recognition unit 11, and the amount of money display unit 13 when the gas ticket issuing button 12 is pressed. Control the operation of each of the building blocks, and a gas ticket issuing unit 14 for issuing a cash lubrication right of the amount displayed in the), a communication unit 15 for performing RS-422 communication with the POS system 20, in particular Through the communication unit 15 transmits data on the input amount of money recognized by the bill input and recognition unit 11 to the POS system 20, a barcode consisting of the input amount and the issue number unique from the POS system 20 Cash petrol issuance form and Received together with the control unit 16 for controlling to be issued as a cash refill right through the fuel ticket issuing unit (14).

And, Figure 4 is an external configuration diagram of the cash receiver 40, as shown in the front of the cash receiver 40, the banknote input and recognition unit 11, the fuel ticket issuing button 12, for the banknote input, A money display unit 13 and a gas ticket issuing unit 14 are provided, and a security button 17 for cash security and a call button 18 for calling a manager when a problem occurs with the cash receiver 40 are further provided. .

Fig. 5 is a block diagram of the plurality of self-lubricators 1 to N (10-1 to N), which includes a lubrication right recognition unit 41 which recognizes a cash lubrication right issued by the cash acceptor 40, a credit card or The card recognition unit 42 for recognizing the corresponding financial card, such as a debit card, the first display unit 43 for displaying the current state of oiling, such as fueling amount, oiling amount, etc. using letters, numbers, or the use of the self-lubricator, A second display unit 44 having an input function for displaying predetermined information for selecting a fueling amount, and a fueling unit unit 45 having a pump driving device and a nozzle device for pumping oil or discharging oil to the outside. ), A receipt issuing unit 46 for issuing a receipt for fueling amount, a voice output unit 47 for guiding the usage of the self-lubricator by sound, and performing the RS-422 communication with the POS system 20. Communication unit 48 and the operation of each of the In particular, through the communication unit 48 transmits the bar code of the cash lubrication ticket recognized by the gasoline ticket recognition unit 41 to the POS system 20, and the fueling start command according to the self-lubrication approval from the POS system 20 The control unit 49 is configured to receive and control self-lubrication through the fueling device unit 45, and to control a receipt to be issued through the receipt issuing unit 46 when oiling is completed.

And, Figure 6 is an external configuration diagram of each self-lubricator, as shown in the front of the self-lubricator fuel tank recognizing unit 41 for recognizing the cash gas ticket, and is attached to the human body for detecting the user's human body Sensor sensor 41-1, card recognition section 42, first display section 43, second display section 44, oiling handle hook of fueling device section 45, receipt issuing section 46 And a speaker of the voice output unit 47, and a security device 50 for security.

The cash receipt processing method in the self-lubrication system according to the present invention configured as described above will be described with reference to the operation flowcharts of FIGS. 7 and 8 as follows.

FIG. 7 is a flowchart illustrating an operation of issuing a lubrication right between the cash receiver 40 and the POS system 20 according to the present invention, and FIG. 8 illustrates a plurality of self-lubricators 1 to N (10-1 to N) and the POS according to the present invention. It is a flow chart showing operation of refueling right and refueling and balance management between the systems 20.

First, the operation of issuing a cash lubrication right in the cash receiver 40 will be described. In the case of inserting a banknote that is cash in the banknote inserting and recognizing unit 11, the banknote inserting and recognizing unit 11 recognizes the banknote inserted and the amount of money. By directly displaying the amount of money input through the display unit 13, it is possible to see how much the user himself has put (S1, S2).

Subsequently, it is determined whether the fuel supply issuance button 12 is pressed after all the amount of fuel to be refueled is input (S3). In this case, if the fuel supply issuance button 12 is pressed, the controller 16 controls the communication unit 15. Through the RS-422 communication of the bill input and recognition unit 11 controls the data to be transmitted to the POS system 20 for the input amount of money (S4).

Then, the POS system 20 stores the data on the input amount transmitted from the cash acceptor 40 in the DB, generates a barcode consisting of the input amount and the issue number, and prints the bar code along with the form for issuing the cash gas ticket. (40) (S5, S6).

Subsequently, the controller 16 of the cash receiver 40 receives a barcode consisting of the input amount and the issue number from the POS system 20 through the RS-422 communication of the communication unit 15 together with the form of issuing the cash gas ticket. The gas ticket issuing unit 14 controls to be issued as a cash gas ticket printed with a bar code (S7).

As described above, the cash lubrication right issued by the cash acceptor 40 may be used as cash in any gas tanker or lubricator as the input amount and the issue unique number are managed by the POS system 20.

Next, a description will be made on the recognition of the fueling right in one of the plurality of self-lubricators 1 to N (10-1 to N) and the operation of fueling and balance management. When the inserted cash gas ticket is inserted into the fuel oil ticket recognition unit 41 in the self-lubrication machine 1 (10-1), the fuel gas ticket inserted in the fuel oil container recognition unit 41 is recognized (S11), and under the control of the controller 49 Through the RS-422 communication of the communication unit 48 transmits the bar code of the cash refill right recognized by the gas ticket recognition unit 41 to the POS system 20 (S12).

 Then, the POS system 20 receives the bar code of the cash gas ticket and inquires whether it is a normal cash gas ticket issued by the cash receiver 40 through the unique number in the bar code, and whether the balance remains in the DB (S13, S14). .

If the result of the inquiry of the cash gas ticket in the above steps (S13, S14) is not a normal cash gas ticket or the balance does not remain, the display of unavailable is displayed on the LCD screen of the second display unit 44 in the self-lubricator 1 (10-1). In order to inform the user (S15), if the balance is present in the normal cash lubrication ticket, the fueling start command according to the self-lubrication approval is transmitted to the self-lubricator 1 (10-1) (S16).

Subsequently, the control unit 49 of the self-lubricator 1 (10-1) receiving the fueling start command from the POS system 20 through the RS-422 communication of the communication unit 48 allows the user to refuel as much as the balance of the cash gas ticket. The fueling device 45 is operated so as to be able to be operated, and the state of being oiled is controlled through the first display unit 43 (S17).

Subsequently, when the fueling is completed, the price data actually oiled by the user is transmitted to the POS system 20 through the RS-422 communication of the communication unit 48 (S18), and the cash storage amount and the actual oiling amount in the POS system 20. If the balance is calculated by calculating the difference between the balance information to be stored in the DB (S19).

Then, when the fueling is completed, the self-lubricator 1 (10-1) to issue a receipt through the receipt issuing unit 46.

As described above, the entire amount is used as the cash gas ticket so that the remaining amount cannot be used again. On the other hand, when the remaining amount is left, the fuel can be automatically refueled as much as the remaining amount without the need to set the fuel amount again.

In other words, the cash gas ticket can be used multiple times instead of just once and discarded, so you can check the balance through the DB search of the POS system and refuel as much as the balance.

As an example, if the self-lubrication machine 1 (10-1) is issued when a cash gas ticket printed with a barcode of 50,000 won and a unique number is issued by injecting 50,000 won through the cash receiver 40. The 50,000 won cash gas ticket can be inserted into and approved for 50,000 won oil fuel.

However, if the fuel tank is full and only fuels 42,000 won, the remaining balance of 8,000 won remains. In this case, the balance was refunded even if the user was uncomfortable, but in the present invention, since the balance information for the remaining 8,000 won is automatically managed in the DB of the POS system, anytime, anywhere issuance of the POS system at the gas station and the self-lubricator in the gas station Checking the code number, you will be able to fuel the remaining 8,000 won.

As described above, the present invention includes only one cash dispenser for issuing a cash gas ticket printed with a barcode instead of the cash dispenser provided in each self-lubricator, and in each of the cash dispensers through each self-lubricator. By recognizing the issued gas ticket, the fuel can be charged as much as the amount of cash stored. This can bring about the effect of installing multiple units with a single cash storage device, which greatly reduces the cost of installing the existing cash storage device. Accordingly, the internal structure of the self-lubricator can be simplified, and thus self-lubrication can be performed in the self-lubricator regardless of the operation of the cash dispenser.

In addition, in the case of the gas station manager, the inconvenience of having to collect bills from each cash dispenser in each self-lubrication machine is eliminated, and the fueling in the self-fueling machine does not need to be stopped when collecting bills, so other users can conveniently refuel. It is effective to be.

In addition, the POS system stores all the data of the cash storage process in the DB, and performs balance management function that can automatically manage the difference between the cash storage amount and the actual fueling amount. Since the balance of the gas ticket can be used, it is possible to provide convenience and reliability of the self-gas station to both users and managers, such as not having to go to the gas station office for a refund.

Claims (6)

When the fueling amount is settled by the use of various financial cards, or when the fueling amount is recognized by recognizing the cash gas ticket, the user can directly use the nozzle gun for the oiling amount as per the storage amount according to the start-up order of the POS system. Multiple self-lubricators, It is connected to the plurality of self-lubricator and cash acceptor through a LAN or communication line, performs the settlement function and management function in each self-lubricator, and stores data on the input amount transferred from the cash acceptor in the DB, the input Generates a barcode consisting of the amount and the issue number and transmits it to the cash depositor together with the form for issuing the cash gas ticket, and receives the barcode of the cash gas ticket recognized by the self-lubricator and the input amount stored in the DB through the issue number in the barcode. A POS system for inquiring a balance and transmitting a fueling start command according to the self-lubrication approval when the balance exists to the self-lubricator and correcting the balance information of the DB; Is connected to the POS system through the VAN and communication lines, and the financial institutions, such as card companies, banks that perform card approval of the POS system, Recognize the banknotes put by the user and transmit the data on the input amount to the POS system, and receive the barcode of the input amount and issuance number and the cash issuance form from the POS system. Self-fueling system with a cash storage processing function, characterized in that consisting of a cash storage for issuing. The method of claim 1, The cash acceptor, A banknote input and recognition unit for inserting a banknote and recognizing the inserted banknote, a gas ticket issuing button pressed for issuing a cash gas ticket, an amount display unit for displaying an input amount recognized by the banknote input and recognition unit, and issuing the fuel ticket When a button is pressed, a gas ticket issuing unit for issuing a cash gas ticket of the amount displayed on the amount display unit, a communication unit performing RS-422 communication with the POS system, and controlling the operation of each of the configuration blocks, the communication unit Transfer the data about the input amount recognized by the banknote input and recognition unit to the POS system, and receives a barcode consisting of the input amount and the issue number from the POS system with the cash gas ticket issuance form and cash through the gas ticket issuing unit Cash storage characterized in that it comprises a control unit for controlling to be issued as a gas ticket A self-fueling system has a function. The method of claim 1, The self-lubricator, A gas ticket recognition unit for recognizing a cash gas ticket issued by the cash receiver, a card recognition unit for recognizing a corresponding financial card such as a credit card or a debit card, a first display unit for displaying the current state of fueling by letters, numbers, and the like; And a second display unit having an input function for guiding the use of the self-lubricator or displaying predetermined information for selecting a fueling amount, and a pump driving device and a nozzle device for pumping oil or discharging oil to the outside. A fueling unit, a receipt issuing unit for issuing a receipt for the fueling amount, a voice output unit for guiding the usage of the self-lubrication machine by sound, a communication unit for performing RS-422 communication with the POS system, and each of the building blocks Control the operation of, and transmit the bar code of the cash gas ticket recognized by the gas ticket recognition unit through the communication unit to the POS system, Receiving a refueling start command according to the self-lubrication approval from the POS system to control the self-lubrication is made through the fueling device unit, and comprises a control unit for controlling the receipt is issued through the receipt issuing unit when the fueling is completed Self-lubrication system with storage function. A cash gas ticket issuing process of recognizing a banknote inserted by a user in the cash receiver and issuing a cash gas ticket printed with a barcode equal to the amount of money input; Inserting and recognizing the cash gas ticket issued in the process of issuing the cash gas ticket in the self-lubricator to check the normal presence and balance of the cash gas ticket from the POS system, and if the balance is present, the user to refuel the amount of cash gas ticket in the self-lubricator Cash requisition and fueling process, When the refilling of the cash gas ticket and the fueling process is completed, the amount data actually lubricated by the user in the self-lubrication machine is transmitted to the POS system, the balance is calculated by calculating the difference between the cash storage amount and the actual fuel amount in the POS system If there is a cash receipt processing method of the self-lubrication system, characterized in that the balance information of the cash gas ticket is stored in the DB, and the balance management and receipt issuance process for issuing a receipt in the self-lubricator. The method of claim 4, wherein The process of issuing the cash gas ticket, A first step of recognizing the banknotes input by the banknote input and recognition unit of the cash receiver and displaying the amount of money input through the amount display unit; A second step of transmitting the data on the input amount recognized by the banknote input and recognition unit through the RS-422 communication to the POS system after the fuel supply issuing button is pressed after all the fueling amount has been input in the first step; The POS system stores data on the input amount transmitted from the cash receiver of the second step in a DB, generates a barcode consisting of the input amount and the issue number, and transmits the barcode to the cash acceptor together with the form of issuing a cash gas ticket. The third step, In the self-lubrication system characterized in that the cash receiver receives a bar code and a cash gas ticket issuance form from the POS system through RS-422 communication to issue a cash gas ticket printed with a barcode equal to the amount of money put into How to handle cash. The method of claim 4, wherein The cash gas ticket inquiry and fueling process, A first step of recognizing the cash gas ticket inserted in the gas ticket recognition unit of the self-lubricator and transmitting the barcode of the cash gas ticket to the POS system through RS-422 communication; A second step of inquiring whether the cash gas ticket is normal and whether the balance remains in the DB through the issue number in the barcode of the cash gas ticket received from the self-lubricator of the first step in the POS system; As a result of the inquiry of the cash gas ticket in the second step, if it is not a normal cash gas ticket or the balance does not remain, the indication is made unavailable through the display unit of the self-fueling machine. Transmitting a start command to the self-lubricator; The self-lubricator operates the fueling device to enable the user to refuel as much as the balance of the cash flow ticket in accordance with the fueling start command received from the POS system of the third step through the RS-422 communication, the display unit to display the state A cash storing processing method in a self-fueling system, characterized in that the fourth step of displaying through.

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