KR20090059723A - Pulling device using a pueumatic buoy - Google Patents

Pulling device using a pueumatic buoy Download PDF

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Publication number
KR20090059723A
KR20090059723A KR1020070126726A KR20070126726A KR20090059723A KR 20090059723 A KR20090059723 A KR 20090059723A KR 1020070126726 A KR1020070126726 A KR 1020070126726A KR 20070126726 A KR20070126726 A KR 20070126726A KR 20090059723 A KR20090059723 A KR 20090059723A
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KR
South Korea
Prior art keywords
underwater
solenoid valve
microprocessor
opening
lifting system
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Application number
KR1020070126726A
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Korean (ko)
Inventor
서상민
Original Assignee
주식회사 코아마
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Priority to KR1020070126726A priority Critical patent/KR20090059723A/en
Publication of KR20090059723A publication Critical patent/KR20090059723A/en

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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A01K61/60—Floating cultivation devices, e.g. rafts or floating fish-farms
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K75/00—Accessories for fishing nets; Details of fishing nets, e.g. structure
    • A01K75/04—Floats
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/02—Agriculture; Fishing; Forestry; Mining
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Business, Economics & Management (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Marketing (AREA)
  • Agronomy & Crop Science (AREA)
  • Zoology (AREA)
  • Economics (AREA)
  • General Health & Medical Sciences (AREA)
  • Human Resources & Organizations (AREA)
  • Mining & Mineral Resources (AREA)
  • Primary Health Care (AREA)
  • Strategic Management (AREA)
  • Tourism & Hospitality (AREA)
  • Physics & Mathematics (AREA)
  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Farming Of Fish And Shellfish (AREA)

Abstract

An aquafarm management method using a pulling device is provided, which enables to pull the farming material growing inside the marine farming area at a predetermined height and to manage it. An aquafarm management method using a pulling device comprises: a step for connecting the line with the branch line to the connecting member of a pneumatic buoy and dropping it; a step(S10) that microprocessor receives the arrival sign in case the pneumatic buoy reaches sea floor or the predetermined location; a transmittal step(S140) for transmitting the signal that microprocessor opens the solenoid valve of the flexible container; a step(S121) for expanding the volume of the flexible container; and a step(S130) for closing the solenoid valve according to the solenoid valve closing signal from the microprocessor.

Description

Lifting system using aquatic couples underwater and farm management method using the same {PULLING DEVICE USING A PUEUMATIC BUOY}

The present invention relates to a lifting system using aquatic fosters and a farm management method using the same, and more specifically, it is possible to lift a farm (rope) or a sunk object using a fosters that can remotely control buoyancy. The present invention relates to a salvage system using aquatic couples and aquaculture farms using the same.

In general, as a method of lifting an object in the water, such as aquaculture, it is widely used to lift the lifting vessel and operate the crane by lifting a lifting wire drawn from a rotating roller or a crane installed in the lifting vessel to the to-be-lifted object. .

By the way, this lifting method is required to be equipped with a rotary roller or crane facility is required to increase the size of the equipment, there is a problem in that a high cost.

In particular, cultivation such as oysters, sea squirts and seaweed is collected after a certain period of time by connecting branch lines at regular intervals to a long line and placing them in a predetermined farm and attaching seeds to each branch line. Do.

However, it is not only very dangerous and difficult to install a submerged fish in aquaculture farms by diving with long lines connected with branch lines, and when the line sinks below a certain height as the load increases in the process of growth, Should be added or replaced and appropriately removed pirate plants, seaweeds and other debris that obstruct or prevent the growth of aquaculture attached to the main line or branch line.

Such a farm management work should be carried out by pulling the main rope up to the vessel, which is not only very difficult but also has a problem of damaging the aquaculture when it is brought up to the vessel by a rotating roller or crane. Could not manage.

Therefore, the present invention was created to solve the above problems, an object of the present invention is to control the buoyancy of the couple in the water remotely in the water lifting system using a dependent couple who can lift the underwater sinking objects. To provide.

In addition, it is an object of the present invention by using a lifting system using the quantum of the rich can be installed in the water in a wide space with a branch line in a wide space to form a farm, by lifting the growing culture in the farm to a predetermined height It is possible to manage the removal of debris, and to provide a way to manage farms that can easily replace and repair the floats.

The lifting system using the underwater buoyant according to an embodiment of the present invention for achieving this object is an underwater buoyant having a fastening member connected at one end and connected to the sinking object, the underwater buoyant, the underwater buoyant And a microprocessor for generating and transmitting an electrical signal for controlling an internal buoyancy of the device, and a sleeper disposed on the water surface to display the position of the couple in water and having a connection terminal with the microprocessor. And a bellows-type container having a solenoid valve controlled by an electrical signal from the microprocessor and an inlet opening and closing by the solenoid valve.

As described above, according to the lifting system using the underwater buoyant according to an embodiment of the present invention, as described above, by remotely controlling the buoyancy, it is possible to economically lift an object sunk in the water with low cost, manpower, and small equipment. In some cases, it is possible to easily lift a sinking object even in a place where a large lifting vessel is difficult to work with.

According to the farm management method using the lifting system using the nutrient rich in the water according to another embodiment of the present invention, it is possible to form a farm by installing a wide line in the water with a branch line, and to grow a predetermined height in the farm It can be managed by removing foreign substances, supplying oxygen, etc., and it is easy to replace and repair the ball.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like reference numerals designate like parts throughout the specification. Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail as follows.

1 is a schematic perspective view of an underwater lifting system according to an embodiment of the present invention, Figure 2 is a longitudinal cross-sectional view along the line II-II of both underwater in accordance with an embodiment of the present invention.

First, referring to FIGS. 1 and 2, the underwater nursing system 1 according to an embodiment of the present invention includes an underwater buoyant 100 in which internal buoyancy is controlled, the underwater buoyant 100 under water, It is disposed on the water surface so as to indicate that the sinking object or the fish farm is located, the surface of the rich to protect the contact terminal or the wireless communication unit 210 and the like electrically connected to the aquatic couple 100 in water 200 ), And a microprocessor 300 for controlling the buoyancy of the underwater couple 100.

The microprocessor 300, which will be described in detail below with reference to FIGS. 3 and 4, may be embedded in the sleep rich part 200 or may be installed in a computer such as a ship.

The solenoid valves 121 and 122 are electrically connected to the contact terminal 210 and the couples 100 under water to open and close the opening 107 of the bellows container 110 embedded in the couples 100 under water. Wire wiring 230 to control the may be further provided.

The wire wiring 230 is wrapped in an elastic member such as a synthetic resin, and is wound so that the length of the foster member 100 is dropped when it is dropped into the water, and the foster member 100 floats due to buoyancy. It can be configured to be wound up to shorten its length.

First, the internal configuration of the underwater couple 100 is described in detail, the underwater couple 100 is the first tubular member 101 and the first tubular member 101 having a conical shape and a hollow tip. The second tubular member 102, which is hollow, is inserted into and reinforced to reinforce the first tubular member 101, and the jabra disposed in the upper and lower portions of the second tubular member 102 and accommodated in the second tubular member 102. The solenoid valves 121 and 122 for opening and closing the opening 107 of the food container 110 and the circuit molding parts 103 and 105 having a control circuit for controlling the same, and the jabra container 110 can support hydraulic pressure. Plate members 104 and 106 fixed by the fixing member 102a in the hollow portion of the second tubular member 102, and a tip portion of the first tubular member 101 of the solenoid valves 121 and 122. When the arranged solenoid valve 121 is opened, the bellows type through the opening 107 A high-pressure gas tank 130 for supplying a high-pressure gas to the 110 and the weight of the high-weight material in the distal end of the first tubular member 101 is placed in the center of gravity of the weight of the two (100) ( 140, and fastening members 10, 10 ', 10 which are firmly fixed to the weight 140 and can be coupled to underwater cultures, ropes, other sinking vessels, etc. which are disposed on the sea bottom or at a predetermined depth. .

When the fastening members 10 'and 10 are metals, the permanent magnets may be further attached thereto, and their shapes and shapes may be variously determined according to the immersion objects.

The weight 140 acts as the center of gravity of the underwater couple (100) when dropping the underwater couple (100) in water on the water surface to fall to a predetermined depth by gravity, the first The deeper the water depth during the fall by the water flowing through the open lower end of the tubular member 101 may receive more driving force.

In addition, the weight 140 is preferably made of a metal having a high density, the first tubular member 101, the second tubular member 102, the plate member 104, 106 is a high density with excellent durability It is formed by extrusion molding a thermoplastic resin selected from polyethylene, polypropylene, polycarbonate, polyethylene terephthalate, polyvinyl collide, nylon and ABS resin. Therefore, it can be used repeatedly for a long time, and it can be broken and not pollute the surroundings.

Meanwhile, the plate member 106 disposed above the plate members 104 and 106 is configured to be slidably coupled along the second tubular member 102 so that the first tubular member 101 may be dropped upon water. When water is introduced through the open lower end portion, the jabra container 110 may be pushed in close contact with a piston.

On the other hand, when the high-pressure gas is supplied to the bellows container 110, the bellows container slides along the second tubular member according to the volume expansion of the bellows container 110 and explodes into the water by exploding into water. Can increase thrust.

Referring now to Figures 3a, 3b, and 4 will be described with respect to the operation of the lifting system using the underwater buoyant according to an embodiment of the present invention.

Figure 3a and Figure 3b is a block diagram of a microprocessor for opening and closing the inlet of the bellows container of the couple of underwater in accordance with an embodiment of the present invention, Figure 4 is the bellows of the couple of underwater in accordance with an embodiment of the present invention It is a flowchart explaining the process of opening and closing the inlet of the container.

Referring to Figure 3a, the lifting system according to an embodiment of the present invention is a circuit molding unit for opening and closing the opening (107) of the jabra container 110 of the nursing father (100) under water by the microprocessor (300) It is configured to transmit the opening and closing signal to the 103, 105, and to open and close the solenoid valves 121, 122 attached to the opening 107 through the circuit molding portion 103, 105.

Referring to FIG. 3B, the microprocessor 300 includes an instruction input unit 311 and an opening / closing amount of solenoid valves 121 and 122 inputted to generate a desired buoyancy through the instruction input unit 311. And a main control unit 217 for storing the signal in the memory 313 and selecting the wired / wireless communication module through the communication unit 317 to transmit an input control signal through the connection terminal or the wireless communication unit 210. Underwater couple 100 is a communication unit for receiving the input control signal to the circuit molding unit 103, 105 to open and close the solenoid valves 121, 122 in accordance with the input control signal from the microprocessor 300 ( 125 and 126 and the first and second control unit 123, 124 for adjusting the opening and closing amount of the solenoid valves 121 and 122, respectively.

According to this configuration, when the opening and closing amount data of the solenoid valves 121 and 122 is input through the command input unit 311 (S10), the main control unit 315 is the communication of the communication unit 317 Selecting a module transmits the input data to the circuit molding unit 103, 105 of the undersea couple 100 through the connection terminal or the wireless device 210 (S20), the amount of underwater to the memory 313 The input data transmitted to the circuit molding units 103 and 105 of the rich person 100 is stored and used as future data.

Meanwhile, the communication units 125 and 126 of the circuit molding units 103 and 105 of the underwater couple 100 receive input data regarding the amount of opening and closing of the solenoid belt, respectively (S110), and the first and second control units. (123, 124) determines whether the pressure of the rich man is more than the received pressure data (S120), and if the pressure of the rich man is less than the received pressure data, the solenoid valve is gradually opened (S121), at which time the opening amount information again Received as the received pressure data and repeatedly determine whether the pressure of the rich is above the received pressure data (S122) and if the pressure of the rich is more than the received pressure data to close the solenoid valve (121, 122) (S130).

In this case, the circuit molding parts 103 and 105 may be tightly molded to be less affected by water, and the circuit molding parts 103 and 105 may be electrically connected to each other through the winding wire wiring 230 or wirelessly. Can be received through the communication unit (125, 126).

Meanwhile, the first and second controllers 125 and 126 transmit the information about the pressure and the received pressure data of the couple's 100 under water to the microprocessor 300 through the communication units 125 and 126. The microprocessor 300 may remotely control and confirm the elderly couple 100 under water.

An application example of the lifting system according to an embodiment of the present invention will now be described in detail with reference to FIGS. 5 and 6.

5 is a conceptual diagram illustrating a method for managing a farm using underwater fosters according to an embodiment of the present invention, Figure 6 is a conceptual diagram illustrating a sinking vessel salvage method using a foster underwater in accordance with an embodiment of the present invention. .

Referring to Figure 5, take a plurality of aquatic couples (100) in the vessel (5) and go to a suitable place for aquaculture spores on the fastening members (10, 10 ', 10) of the plurality of aquatic couples (100) Dropped while connecting the ends of the line 20 with the branch line 21 is planted.

At this time, between the fastening members 10, 10 ', 10 and the filing line 20 of the underwater couple 100 is attached to drop a very heavy fixture (3). Therefore, the underwater couple 100 will be able to quickly sink downward by gravity by the center of gravity 140 and the fixed body (3).

When the fixing body 3 is fixed to the sea bottom or a predetermined position, the main control part 317 of the microprocessor 300 is connected to the circuit molding part 103 of the undernourished child 100. The solenoid valve 121 transmits an open / close signal and the first control unit 121 of the circuit molding unit 103 that receives the open / close signal opens the solenoid valve 121 to open the high pressure gas supply unit 130. By supplying the high pressure gas to the bellows container 110 through the bellows container 110 is expanded by the kinetic energy of the high-pressure gas and the buoyancy of the child 100 by the buoyancy increase of the buoyant (100) underwater As you rise, you can pull the circle 20.

At this time, since the wire or rope connecting the underwater rich man 100 and the sleeping rich man 200 is wound to have elasticity, the wire or rope is wound on the sea surface because the wire or rope is wound in response to the rising of the underwater rich man 100. It can be prevented from interfering with the movement of ships or meat.

In this way, the floating couple in the water (100) floating in the water can be filled with a high-pressure gas in the high-pressure gas supply unit in the water.

On the other hand, the aquaculture on the branch line (21) attached to the raw line should be collected or matured to remove the foreign matter, etc. for the growth of the aquaculture, the microprocessor 300, the microprocessor (300) By controlling the circuit molding part 105 disposed on the upper portion of the jabra container 110 of 100, the air of the constant pressure is removed through the solenoid valve 122, and the solenoid valve 122 is closed to enable re-dropping. Can be.

In this way, when the retired couples in the water 100 is re-dropped, there will be an excess in the raw line, and the excess of the raw line will float in the water. It is easier to manage the farm without diving or pulling the rope over the ship.

In addition, as shown in FIG. 6, when the ship 5 is irradiated with infrared rays to find an underwater sinking vessel, the underwater rich man 100 is dropped at the position where the vessel is located, and the underwater quantity When the fastening member 10 at the end of the rich 100 is made of a very ferromagnetic material, the submarine 100 can be firmly fastened to the sinking ship 5.

According to this, it is possible to first submerge into deep waters and tie the sunk ships with ropes.

In this way, when the couple in the water 100 and the sinking object, for example, the vessel is coupled to the first and second control unit (103, 105) and transmits the combined signal through the communication unit (125, 126), and received the micro The processor 300 transmits an opening / closing signal through the communication unit 317 so as to open and close the solenoid valve 121 of the underwater couple 100 and the first and second control units 103 and 105 which receive it gradually become solenoid valves. The high-pressure gas is supplied from the high-pressure gas supply unit 130 to the bellows-type container 110 by opening and closing the 121 to lift the sinking object 3 by the buoyancy increase due to the expansion of the container 110.

The microprocessor 100 stores the data of the pressure of the high-pressure gas supply unit 130, the opening / closing amount of the solenoid valve 121, the pressure of the bellows type container 110, and the like in a memory 315 to make a database. In the future, the weight of the sinking body (3), it can be used as data in the design of the couple (100) under water according to the depth.

As described above, the pressure of the high-pressure gas supply unit 130 of the couple under water 100 is preferably at least 100 atm so as to provide a buoyancy much larger than the sum of the air pressure and the water pressure, the couple under water 100 The size and length of the will be designed according to the size and weight of the lifting body.

Although the above described vessel lifting mechanism using buoyancy according to a preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment can be implemented in other various forms, only the present embodiment disclosed the present invention It is provided to make the scope of the present invention clear to those of ordinary skill in the art.

1 is a schematic perspective view of an underwater lifting system according to an embodiment of the present invention,

Figure 2 is a longitudinal sectional view along the line II-II of the couple in the underwater according to an embodiment of the present invention,

3a and 3b is a block diagram of a microprocessor for opening and closing the inlet of the bellows container of both underwater in accordance with an embodiment of the present invention,

Figure 4 is a flow chart illustrating a process for opening and closing the entrance of the bellows container in both children in accordance with an embodiment of the present invention,

5 is a conceptual diagram illustrating a method for managing aquaculture farms using both rich and underwater in accordance with an embodiment of the present invention,

6 is a conceptual diagram illustrating a sinking vessel salvage method using a floating couple underwater in accordance with an embodiment of the present invention.

Claims (11)

An underwater buoyant having a buoyant member at one end having an internal buoyancy controlled and connected to a sinking object, a microprocessor for generating and transmitting an electrical signal controlling the internal buoyancy of the underwater buoy, and the location of the underwater buoyant It is disposed on the water surface to display a and includes a sleeping portion that is built in the connection terminal with the microprocessor, wherein both the underwater buoys are opened and closed by the solenoid valve and the solenoid valve controlled by an electrical signal from the microprocessor Lifting system using a rich man in water having a bellows container having a. The method of claim 1, The two couples underwater, the first end of the conical and hollow tubular member; A hollow second tubular member fitted into the first tubular member to reinforce the first tubular member; A circuit molding part disposed above and below the second tubular member and having a solenoid valve for opening and closing an opening of the jabra container accommodated in the second tubular member and a control circuit controlling the same; A plate member fixed by a fixing member in the hollow portion of the second tubular member so that the jabra vessel can support hydraulic pressure; A high pressure gas supply unit for supplying a high pressure gas to the bellows vessel through the opening when the solenoid valve disposed at the front end of the first tubular member of the solenoid valve is opened; A lifting system using underwater quantum including; a weight which is filled with a high-density material in the front end of the first tubular member is disposed the center of gravity of the underwater couple. The method of claim 2, Lifting system using the two-in-one buoyant body securely fixed to the weight and including a fastening member connected by a swivel or the like. The method of claim 3, wherein The fastening member is a lifting system using both fertilizers and underwater ferromagnetic material. The method of claim 1, Lifting system using the wire and the wires or connecting wires that connects the underwater rich and the sleeping rich is wrapped around the elastic member. The method of claim 1, The microprocessor includes a command input unit for inputting solenoid valve opening / closing data, a communication unit for transmitting valve opening / closing amount data inputted through the command input unit, a memory for storing the input valve opening / closing amount data, and a main fisherman controlling them. Lifting system using a wealthy couple underwater. The method of claim 6, A communication unit for receiving the opening / closing amount data transmitted from the communication unit of the microprocessor, and a control unit comparing the rich pressure and the pressure data of the input / opening amount data according to the received opening / closing amount data and controlling the opening / closing amount of the solenoid valve. Lifting system using the underwater buoy included in the circuit molding. The method of claim 7, wherein The main control unit is a lifting system using a two-in-one floater to control the solenoid valve gradually by receiving data related to the opening and closing amount of the solenoid valve from the first and second control unit of the circuit molding. An underwater buoyant having a buoyant member at one end having an internal buoyancy controlled and connected to a sinking object, a microprocessor for generating and transmitting an electrical signal controlling the internal buoyancy of the underwater buoy, and the location of the underwater buoyant And a sleeper part disposed on the surface of the water surface and having a connection terminal with the microprocessor, wherein the two sons under water have a circuit molding part having a solenoid valve controlled by an electrical signal from the microprocessor; In the method of managing the farm by using a lifting system using a sheep-bearing man with a bellows-type container having an inlet opening and closing by a molding part, Dropping by connecting a circle with a branch line to the fastening member of the couple under water; Receiving, by the microprocessor, an arrival signal when both of the underwater couples reach the bottom or a predetermined position; The microprocessor transmitting a signal to open the solenoid valve of the bellows container; Opening the solenoid valve to supply a high pressure gas to the bellows vessel to expand the volume of the bellows vessel; And closing the solenoid valve in response to a solenoid valve closing signal from the microprocessor when the couple is in a predetermined position. The method of claim 9, Filling the high pressure gas supply unit with the high pressure gas supply unit of both the underwater couples when the floating couples are underwater; A method of managing aquaculture farms using a lifting system using a foster child in water further comprising the step of repairing the foster child in water. The method of claim 9, The microprocessor opens the other solenoid valve of the bellows container of both of the submerged couples to deflate the bellows container, A step in which the main line floats when the winding wire of the couple is underwater; A method of managing a farm using a lifting system using a couple of nutrients in the water, including the step of collecting the food from the branch line attached to the line that emerged to the predetermined position, or removing foreign matter.
KR1020070126726A 2007-12-07 2007-12-07 Pulling device using a pueumatic buoy KR20090059723A (en)

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KR1020070126726A KR20090059723A (en) 2007-12-07 2007-12-07 Pulling device using a pueumatic buoy

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160031943A (en) * 2014-09-12 2016-03-23 유한회사 하이엔진 It includes one hundred and expansion vessel lifting gear, air bounce

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160031943A (en) * 2014-09-12 2016-03-23 유한회사 하이엔진 It includes one hundred and expansion vessel lifting gear, air bounce

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