CN112015241A - Block chain network node service device - Google Patents

Block chain network node service device Download PDF

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Publication number
CN112015241A
CN112015241A CN202011002926.6A CN202011002926A CN112015241A CN 112015241 A CN112015241 A CN 112015241A CN 202011002926 A CN202011002926 A CN 202011002926A CN 112015241 A CN112015241 A CN 112015241A
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CN
China
Prior art keywords
fixed
network node
chain network
block
wall
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN202011002926.6A
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Chinese (zh)
Inventor
薛一飞
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Gushu Information Technology Co ltd
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Shanghai Gushu Information Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Gushu Information Technology Co ltd filed Critical Shanghai Gushu Information Technology Co ltd
Priority to CN202011002926.6A priority Critical patent/CN112015241A/en
Publication of CN112015241A publication Critical patent/CN112015241A/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1601—Constructional details related to the housing of computer displays, e.g. of CRT monitors, of flat displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
    • F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
    • F16M11/20—Undercarriages with or without wheels
    • F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
    • F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
    • F16M11/28—Undercarriages for supports with one single telescoping pillar
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/18—Packaging or power distribution
    • G06F1/181—Enclosures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/20—Cooling means

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Power Engineering (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

The invention discloses a block chain network node service device which comprises a base, wherein a fixed sleeve column is fixed at the top end of the base, a connecting column movably penetrates through the inner side of the fixed sleeve column, the connecting column extends to the outer wall of the top end of the fixed sleeve column, and a node service host is fixed at the top of the connecting column; the bottom of the connecting column is provided with a sliding groove; a forward and reverse rotation motor is fixed in a cavity of the base, an output shaft of the forward and reverse rotation motor is rotatably connected with a screw rod, and the screw rod rotatably penetrates through the outer wall of the bottom of the fixed sleeve column; the height of the device can be conveniently and rapidly adjusted through the arranged forward and reverse rotating motor, so that the device is convenient for a user to operate and use, and the universality of the device is improved; through the arranged cleaning brush head, the ball nut can be driven to rotate and the cleaning brush head can be driven to clean dust on the outer wall of the screw rod; through the protection casing that sets up, can protect control panel, it is troublesome to have reduced the staff to control panel's cleanness.

Description

Block chain network node service device
Technical Field
The present invention relates to the technical field of node service devices, and in particular, to a node service device for a block chain network.
Background
The network node server is an SNA network node, a server device. The node server is for a server cluster, and is mainly applied to services of WEB, FTP, VPN and the like.
However, the existing block chain network node service device still has some disadvantages, when a user operates the device, the height of the device cannot be adjusted according to the height of the user, and the problem that the user is inconvenient to operate the device exists; in addition, after the device is used for a long time, dust falls on the surface of the screw rod, so that the problem of reducing the transmission efficiency of the screw rod exists; in addition, as the control panel is arranged on the surface of the node service host, dust is easy to accumulate on the control panel after long-term use, and the content of the display screen is inconvenient to observe, so that the block chain network node service device is provided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the block chain network node service device, the height of the device can be conveniently and rapidly adjusted through the arranged adjusting mechanism, the device is convenient for a user to operate and use, and the universality of the device is improved.
In order to solve the technical problems, the invention provides the following technical scheme: a block chain network node service device comprises a base, wherein a fixed sleeve column is fixed at the top end of the base, a connecting column movably penetrates through the inner side of the fixed sleeve column, extends to the outer wall of the top end of the fixed sleeve column, and is fixed with a node service host at the top; the bottom of the connecting column is provided with a sliding groove; a forward and reverse rotation motor is fixed in a cavity of the base, an output shaft of the forward and reverse rotation motor is rotatably connected with a screw rod, the screw rod rotatably penetrates through the outer wall of the bottom of the fixed sleeve column, one side of the screw rod, far away from the forward and reverse rotation motor, extends into the sliding groove and is rotatably sleeved with a ball nut on the outer wall, and the connecting column is sleeved on the outer wall of the ball nut; the bottom of ball nut is fixed with the fixed frame of symmetry, the inboard of fixed frame is fixed with evenly distributed's fixed spring, fixed spring's end is fixed with the mounting panel, the inboard of mounting panel is fixed with clean brush head through the bolt, a side surface of clean brush head hugs closely in the outer wall of lead screw.
As a preferred technical scheme of the invention, the front surface of the node service host is movably connected with a protective cover; a sliding block is fixed on the front surface of the node service host, a fixed groove is formed in the surface of one side of the sliding block, and return springs distributed at equal intervals are fixed on the inner side of the fixed groove; the both sides rear surface of protection casing all sets up the spout with slider cunning, slider and spout grafting adaptation, the card hole that is used for the block buckle that the equidistance distributes is all seted up on the both sides surface of protection casing.
As a preferred technical scheme of the invention, the two side surfaces of the base are respectively provided with a heat dissipation window, and the inner side of each heat dissipation window is fixed with a dust screen through a fixing bolt.
As a preferred technical scheme of the invention, the bottom end of the base is fixed with two symmetrical shock absorption seats, and the bottom of each shock absorption seat is fixed with a rubber pad.
As a preferred technical solution of the present invention, a heat dissipation port is formed at the front side of the lower end of the node service host, and a filter screen is clamped at the inner side of the heat dissipation port.
As a preferable technical scheme of the invention, the outer surface of the protective cover is provided with the anti-collision strips which are distributed in a W shape at equal intervals.
As a preferable technical scheme of the invention, the cross section of the protective cover is U-shaped, and the protective cover is made of synthetic resin.
As a preferable technical scheme of the invention, five groups of the clamping holes are arranged on the surface of one side of the protective cover at equal intervals.
As a preferable technical scheme of the invention, the bottom end of the base is fixed with two symmetrical wheels which are universal wheels.
As a preferred technical scheme of the invention, a rotating disc is fixed at the joint of the connecting column and the node service host, and anti-skid grains are arranged on the outer wall of the rotating disc.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. the positive and negative rotating motor effectively avoids the problem that the height of the device cannot be adjusted according to the height of a user when the user operates the device, so that the device is inconvenient to operate by the user, the height of the device can be conveniently and quickly adjusted, the user can conveniently operate and use the device, and the universality of the device is improved;
2. through the arranged cleaning brush head, the problem that dust falls on the surface of the screw rod after the device is used for a long time, and the transmission efficiency of the screw rod is reduced is effectively solved, so that the ball nut can drive the cleaning brush head to clean the dust on the outer wall of the screw rod while rotating, the up-and-down movement effect of the connecting column driven by the screw rod on the inner side of the fixed sleeve column is ensured, and the service life of the screw rod is prolonged;
3. through the protection casing that sets up, effectively avoided because control the panel and install on the surface of node service host computer, control easy deposit dust on the panel after long-term the use, there is the inconvenient problem of observing the display screen content, can protect control panel, reduced staff to control panel's clean trouble, guaranteed then the control action of control panel to node service host computer.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the base and the fixed sleeve and connecting post of FIG. 1 according to the present invention;
FIG. 3 is an enlarged view of A of FIG. 2 according to the present invention;
FIG. 4 is a schematic top view of the node servicing host and shield of FIG. 1 according to the present invention;
fig. 5 is an enlarged view of B in fig. 4 according to the present invention.
Wherein: 1. a base; 2. fixing the sleeve column; 3. connecting columns; 4. a node service host; 5. a protective cover; 6. a positive and negative rotation motor; 7. a screw rod; 8. a ball nut; 9. a sliding groove; 10. a fixing frame; 11. fixing the spring; 12. mounting a plate; 13. cleaning the brush head; 14. a slider; 15. a chute; 16. fixing grooves; 17. a return spring; 18. buckling; 19. and (6) clamping the hole.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example (b):
as shown in fig. 1-3, a block chain network node service device includes a base 1, a fixed sleeve column 2 is fixed at the top end of the base 1, a connection column 3 movably penetrates through the inner side of the fixed sleeve column 2, the connection column 3 extends to the outer wall of the top end of the fixed sleeve column 2, and a node service host 4 is fixed at the top; the bottom of the connecting column 3 is provided with a sliding groove 9; a forward and reverse rotation motor 6 is fixed in a cavity of the base 1, an output shaft of the forward and reverse rotation motor 6 is rotatably connected with a screw rod 7, the screw rod 7 rotatably penetrates through the outer wall of the bottom of the fixed sleeve column 2, one side of the screw rod 7, far away from the forward and reverse rotation motor 6, extends into a sliding groove 9 and is rotatably sleeved with a ball nut 8 on the outer wall, and the connecting column 3 is sleeved on the outer wall of the ball nut 8; the bottom of the ball nut 8 is fixed with a symmetrical fixed frame 10, the inner side of the fixed frame 10 is fixed with uniformly distributed fixed springs 11, the tail end of each fixed spring 11 is fixed with a mounting plate 12, the inner side of each mounting plate 12 is fixed with a cleaning brush head 13 through bolts, and one side surface of each cleaning brush head 13 is tightly attached to the outer wall of the screw rod 7;
when the height of the device is adjusted, the credit is given to start the forward and reverse rotating motor 6, so that the screw rod 7 can rotate, then the connecting column 3 arranged on the ball nut 8 can be driven to move up and down on the inner side of the fixed sleeve column 2, and then the distance of the connecting column 3 on the fixed sleeve column 2 can be adjusted, so that the height of the device can be conveniently and rapidly adjusted, a user can conveniently operate and use the device, and the universality of the device is improved; when the screw 7 is cleaned, the ball nut 8 rotates on the screw 7 to drive the fixing frame 10 arranged at the bottom of the screw to rotate, so that the cleaning brush head 13 arranged on the fixing frame 10 can rotate on the outer wall of the screw 7, and the elastic acting force of the fixing spring 11 can ensure that one side surface of the cleaning brush head 13 is abutted against the outer wall of the screw 7, meanwhile, the cleaning brush head 13 can move left and right, so that the rotation of the cleaning brush head 13 on the outer wall of the screw rod 7 can clean the dust on the screw rod 7, thereby realized ball nut 8 can drive clean brush head 13 when the pivoted and clean the dust of the outer wall of lead screw 7, guaranteed then that lead screw 7 drives the reciprocating action of spliced pole 3 in fixed sleeve post 2 inboard, prolonged the life of lead screw 7 simultaneously.
In other embodiments, the present embodiment discloses a protection structure of a control panel, please refer to fig. 1, fig. 4, and fig. 5, wherein a protection cover 5 is movably connected to a front surface of a node service host 4; a sliding block 14 is fixed on the front surface of the node service host 4, a fixed groove 16 is formed in the surface of one side of the sliding block 14, and return springs 17 distributed at equal intervals are fixed on the inner side of the fixed groove 16; the rear surfaces of the two sides of the protective cover 5 are respectively provided with a sliding chute 15 which is in sliding fit with the sliding block 14, the sliding block 14 is in splicing fit with the sliding chute 15, and the surfaces of the two sides of the protective cover 5 are respectively provided with clamping holes 19 which are distributed at equal intervals and used for clamping the buckles 18;
when protecting control panel, at first press buckle 18 inwards through reset spring 17's elastic force, make buckle 18 can press into the inside of fixed slot 16, at this moment carry out the slip from the bottom up in the outside of slider 14 through spout 15 with protection casing 5 again, when sliding to suitable position, at this moment buckle 18 will receive reset spring 17's resilience effort and move to the outside, make buckle 18 pop out the inboard of card hole 19, then can be with the stable front surface of installing at node service host computer 4 of protection casing 5, thereby can realize protecting control panel, it is troublesome to control panel's cleanness to have reduced the staff, then guaranteed control panel to node service host computer 4's control action.
In other embodiments, the present embodiment discloses the opening position of the heat dissipation window, as shown in fig. 1, the heat dissipation window is formed on both side surfaces of the base 1, and the inner side of the heat dissipation window is fixed with a dust screen through a fixing bolt;
the heat dissipation windows are arranged on the two sides of the base 1, so that heat generated when the forward and reverse rotation motor 6 works can be discharged, and the normal operation of the forward and reverse rotation motor 6 is further ensured; and through the installation of the dustproof net, the dust outside can be prevented from entering, and then the positive and negative rotation motor 6 can be effectively protected from dust.
In other embodiments, the present embodiment discloses the installation position of the shock absorbing seat, please refer to fig. 1, wherein two pairs of symmetric shock absorbing seats are fixed at the bottom end of the base 1, and rubber pads are fixed at the bottom of the shock absorbing seats;
the vibration generated when the forward and reverse rotating motor 6 works can be buffered by installing the vibration absorbing seats which are symmetrical in pairs at the bottom end of the base 1, so that the stability of the device is ensured; and the rubber pad is arranged at the bottom of the shock absorption seat, so that the friction force at the bottom of the shock absorption seat can be increased, and the stability of the shock absorption seat is improved.
In other embodiments, the present embodiment discloses the opening position of the heat dissipation opening, please refer to fig. 1, the front side of the lower end of the node service host 4 is provided with the heat dissipation opening, and the inner side of the heat dissipation opening is clamped with the filter screen;
the heat dissipation port is formed in the front surface of the lower end of the node service host 4, so that heat generated during operation of the node service host 4 can be dissipated frequently, and normal operation and use of the node service host 4 are guaranteed.
In other embodiments, the embodiment discloses that the outer surface of the protective cover 5 is provided with the W-shaped bumper strips, as shown in fig. 4, the outer surface of the protective cover 5 is provided with the bumper strips, and the bumper strips are distributed in the W-shape at equal intervals;
through setting up the anticollision strip at the surface of protection casing 5, can reduce the damage that external factor caused protection casing 5, can protect protection casing 5 to a certain extent, then can prolong the life of protection casing 5.
In other embodiments, the present embodiment discloses the vertical cross-sectional shape and material of the protective cover 5, as shown in fig. 4, the cross-section of the protective cover 5 is "U" shaped, and the protective cover 5 is made of synthetic resin;
through carrying out "U" shape structure and synthetic resin's design to protection casing 5, can be better protect control panel, also prolonged protection casing 5's life simultaneously.
In other embodiments, the number of the fastening holes 19 is disclosed in the present embodiment, as shown in fig. 4, five groups of fastening holes 19 are provided, and the five groups of fastening holes 19 are equidistantly provided on a side surface of the protective cover 5;
through setting up five groups of card holes 19 for the position of protection casing 5 can be adjusted, has further improved the barrier propterty of protection casing 5 to control panel.
In other embodiments, the present embodiment discloses the mounting positions of the wheels, as shown in fig. 1, two pairs of symmetric wheels are fixed at the bottom end of the base 1, and the wheels are universal wheels;
the wheels which are symmetrical in pairs are arranged at the bottom end of the base 1, so that the device can be conveniently moved.
In other embodiments, the present embodiment discloses an installation position of a rotating disc, please refer to fig. 1, where a rotating disc is fixed at a connection position of a connection column 3 and a node service host 4, and an outer wall of the rotating disc is provided with anti-slip lines;
the rotating disc is arranged between the connecting column 3 and the node service host 4, so that the angle of the node service host 4 can be adjusted, and the use of a user is further facilitated.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A blockchain network node serving device, comprising a base (1), characterized in that: a fixed sleeve column (2) is fixed at the top end of the base (1), a connecting column (3) movably penetrates through the inner side of the fixed sleeve column (2), the connecting column (3) extends to the outer wall of the top end of the fixed sleeve column (2), and a node service host (4) is fixed at the top of the connecting column; the bottom of the connecting column (3) is provided with a sliding groove (9); a forward and reverse rotation motor (6) is fixed in a cavity of the base (1), an output shaft of the forward and reverse rotation motor (6) is rotatably connected with a screw rod (7), the screw rod (7) rotatably penetrates through the outer wall of the bottom of the fixed sleeve column (2), one side, far away from the forward and reverse rotation motor (6), of the screw rod (7) extends into the sliding groove (9) and is rotatably sleeved with a ball nut (8) on the outer wall, and the connecting column (3) is sleeved on the outer wall of the ball nut (8); the bottom of ball nut (8) is fixed with fixed frame (10) of symmetry, the inboard of fixed frame (10) is fixed with evenly distributed's fixed spring (11), the end of fixed spring (11) is fixed with mounting panel (12), the inboard of mounting panel (12) is fixed with clean brush head (13) through the bolt, a side surface of clean brush head (13) hugs closely in the outer wall of lead screw (7).
2. A block-chain network node serving means as claimed in claim 1, wherein: the front surface of the node service host (4) is movably connected with a protective cover (5); a sliding block (14) is fixed on the front surface of the node service host (4), a fixed groove (16) is formed in the surface of one side of the sliding block (14), and return springs (17) which are distributed at equal intervals are fixed on the inner side of the fixed groove (16); the both sides rear surface of protection casing (5) all seted up spout (15) with slider (14) cunning, slider (14) and spout (15) grafting adaptation, the card hole (19) that are used for block buckle (18) that the equidistance distributes are all seted up to the both sides surface of protection casing (5).
3. A block-chain network node serving means as claimed in claim 1, wherein: the heat dissipation window is formed in the surfaces of the two sides of the base (1), and the inner side of the heat dissipation window is fixed with a dust screen through a fixing bolt.
4. A block-chain network node serving means as claimed in claim 1, wherein: the shock absorption seat is characterized in that shock absorption seats which are symmetrical in pairs are fixed at the bottom end of the base (1), and rubber pads are fixed at the bottoms of the shock absorption seats.
5. A block-chain network node serving means as claimed in claim 1, wherein: the lower extreme front side of node service host computer (4) is opened and is equipped with the thermovent, the inboard joint of thermovent has the filter screen.
6. A block-chain network node serving means according to claim 2, wherein: the surface of protection casing (5) is provided with the anticollision strip, the anticollision strip is "W" form equidistance and distributes.
7. A block-chain network node serving means according to claim 2, wherein: the cross section of the protective cover (5) is U-shaped, and the protective cover (5) is made of synthetic resin.
8. A block-chain network node serving means according to claim 2, wherein: five groups are arranged on the clamping holes (19), and the five groups of the clamping holes (19) are equidistantly arranged on one side surface of the protective cover (5).
9. A block-chain network node serving means as claimed in claim 1, wherein: the bottom of the base (1) is fixed with two pairwise symmetrical wheels, and the wheels are universal wheels.
10. A block-chain network node serving means as claimed in claim 1, wherein: the joint of the connecting column (3) and the node service host (4) is fixed with a rotating disc, and the outer wall of the rotating disc is provided with anti-skid grains.
CN202011002926.6A 2020-09-22 2020-09-22 Block chain network node service device Withdrawn CN112015241A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011002926.6A CN112015241A (en) 2020-09-22 2020-09-22 Block chain network node service device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011002926.6A CN112015241A (en) 2020-09-22 2020-09-22 Block chain network node service device

Publications (1)

Publication Number Publication Date
CN112015241A true CN112015241A (en) 2020-12-01

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Application Number Title Priority Date Filing Date
CN202011002926.6A Withdrawn CN112015241A (en) 2020-09-22 2020-09-22 Block chain network node service device

Country Status (1)

Country Link
CN (1) CN112015241A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114017628A (en) * 2021-11-22 2022-02-08 段金辉 Land space planning building topography measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114017628A (en) * 2021-11-22 2022-02-08 段金辉 Land space planning building topography measuring device
CN114017628B (en) * 2021-11-22 2023-01-13 段金辉 Land space planning building topography measuring device

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Application publication date: 20201201