CN215245545U - Nonmetal vacuum closestool for aviation - Google Patents
Nonmetal vacuum closestool for aviation Download PDFInfo
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- CN215245545U CN215245545U CN202121603107.7U CN202121603107U CN215245545U CN 215245545 U CN215245545 U CN 215245545U CN 202121603107 U CN202121603107 U CN 202121603107U CN 215245545 U CN215245545 U CN 215245545U
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Abstract
The utility model discloses a nonmetal vacuum toilet for aviation. The toilet comprises a toilet bowl, a flushing ring, a discharge valve, a flushing valve bracket, a flushing ring spray head, a toilet bracket, a drainage pipe I, a valve gland and a drainage pipe II; the toilet bracket is fixed through a screw, the toilet bowl is placed on the toilet bracket, the flushing ring is placed on the toilet bowl, the flushing ring nozzle is fixed at the bottom of the flushing ring, and the flushing valve is connected with the flushing ring through a back siphon component and is connected with the toilet bracket through a flushing valve bracket; the discharge valve is connected with the closestool bracket; one end of the drain pipe I is directly butted with a drain outlet of the toilet bowl, the other end of the drain pipe I is connected with the drain valve, and the drain pipe II is connected with the drain valve through a valve gland and a screw. The utility model has the advantages of compact structure is simple, adopts combined material in a large number, and weight is lighter, can satisfy different position demands through less change, has certain flexibility, is in the same place control panel and motor integration, and electromagnetic compatibility is better.
Description
Technical Field
The utility model relates to a nonmetal vacuum closestool is used in aviation.
Background
The vacuum toilet relies on the discharge valve to keep apart the waste pipe of closestool inside and discharge valve opposite side, is the vacuum environment of certain degree in the waste pipe, is the cabin internal pressure in the closestool, and the excrement in with the closestool is sucked to the waste pipe through the pressure differential of discharge valve both sides, and the discharge valve closes at last and accomplishes a washing cycle.
The vacuum closestool in the current market has the following four problems that firstly, most of structures are made of metal and have heavier weight; secondly, the internal structures are connected by screws or bolts, and when the closestool fails, the disassembly and the assembly are troublesome, and the time consumption is long; thirdly, the height of the closestool is fixed, and the closestool cannot be flexibly changed according to different installation and use requirements; fourthly, the toilet bowl is divided into a left part and a right part, and partial parts of the left part and the right part are also divided into the left part and the right part.
Therefore, there is a need for an aviation toilet that is light in weight, easy to assemble and disassemble, adjustable in height, and versatile in left and right parts.
Disclosure of Invention
The utility model aims at providing an aviation is with nonmetal vacuum closestool, compact structure is simple, adopts combined material, light in weight in a large number, the dismouting of being convenient for, closestool height-adjustable, can satisfy different position demands through less change, the closestool left and right sides piece can be general, have certain flexibility, with circuit board and motor integration together, electromagnetic compatibility is better.
In order to realize the purpose, the technical scheme of the utility model is that: the utility model provides an aviation is with nonmetal vacuum closestool which characterized in that: comprises a flushing ring, a drain pipe II, a flushing valve, a discharge valve, a flushing ring spray head, a closestool bracket, a closestool basin and a drain pipe I;
the toilet bowl is positioned on the toilet bracket; the flushing ring is positioned on the toilet bowl; the flushing ring spray head is fixed on the flushing ring;
the flushing valve is connected with the flushing ring through the back siphon component and is connected with the closestool bracket through the flushing valve bracket;
the discharge valve is connected with the closestool bracket;
one end of the drain pipe I is butted with a drain outlet of the toilet bowl, and the other end of the drain pipe I is connected with a drain valve;
and the drain pipe II is connected with a drain valve.
In the technical scheme, the closestool bracket is connected with the floor through a screw;
the closestool support comprises a closestool left support and a closestool right support, and the closestool left support and the closestool right support are fixed through screws;
the closestool left bracket and the closestool right bracket are symmetrically arranged.
In the technical scheme, a sealing glue is coated on the contact surface of the flushing ring spray head and the flushing ring;
a circle of flushing holes are arranged on the flushing ring spray head.
In the technical scheme, the inner surface of the toilet bowl is sprayed with Teflon.
In the technical scheme, the back siphon assembly comprises a flushing port, a back siphon assembly shell, a valve cap, a valve core, a spring, a sealing ring and a sealing ring;
the flushing port is positioned at the side end of the shell of the back siphon component and is connected with the flushing ring;
a first cavity and a second cavity are arranged in the back siphon component shell; the first cavity is positioned above the second cavity;
the first cavity is communicated with the flushing port;
the top of the first cavity is provided with a valve cap, and the middle of the first cavity is provided with a valve core; the spring is arranged at the bottom of the valve core and is positioned at the bottom of the first cavity;
the sealing ring is arranged at the top of the second cavity.
In the technical scheme, a sealing ring is arranged at the joint of the drain pipe I and the drain valve, so that the sealing property of the drain pipe I is ensured; two sealing grooves are arranged at the sewage discharge port of the toilet bowl, and sealing rings are arranged in the sealing grooves;
a sealing ring is arranged at the joint of the drain pipe II and the drain valve;
and the drain pipe II is fixed on the drain valve through a valve gland.
In the technical scheme, the flushing ring fixing block is fixed on the flushing ring through a screw, the flushing ring fixing block is fixed on the closestool support through a quick-release pin, and the flushing ring is fixed on the closestool support through the flushing ring fixing block and a fixing piece; a rubber pad is arranged between the flushing ring fixing block and the closestool bracket;
the flushing valve bracket is connected with the closestool bracket through a quick-release pin; the back siphon component is fixed at the upper end of the flushing valve bracket through a screw, and the flushing valve is fixed at the lower end of the flushing valve bracket through a screw; the back siphon component is communicated with the flushing valve;
one side of the discharge valve is connected with the closestool bracket through a screw, and the other side of the discharge valve is connected with the closestool bracket through an inserted link;
the drain pipe II is connected with the drain valve through a valve gland and a screw;
the back siphon component is respectively connected with the flushing ring, the flushing valve bracket and the lower flushing valve shell through screws.
In the above technical solution, the discharge valve includes an electric mechanism assembly, a shutter disk assembly and a control board assembly; the electric mechanism assembly and the control panel assembly are integrated in the control panel assembly shell; the valve disc assembly is arranged at one end of the control panel assembly shell;
the control board is fixed at the bottom of the control board assembly shell, and the socket hole is positioned at the right end of the control board assembly shell;
the inserted rod is arranged at the upper end of the control board assembly shell; the control board assembly shell is connected with the closestool support through the inserted bar.
The utility model has the advantages that:
(1) the utility model integrates the electric mechanism component and the control panel component, thereby simplifying the structure of the closestool, reducing the weight of the product and improving the electromagnetic compatibility;
(2) the utility model has light weight; the utility model adopts a large amount of non-metallic materials (the non-metallic materials in the utility model comprise plastics such as Polyetherimide (PEI), polypropylene (PP) and the like), and the weight is light;
(3) the utility model is convenient for disassembly and assembly; all the components in the utility model are connected by bolts or quick-release connection, which is convenient for disassembly and assembly;
(4) the height of the closestool of the utility model is adjustable; the utility model can achieve the purpose of changing the height of the closestool (the whole height of the closestool of the utility model is equal to the sum of the height of the bracket and the height of the flushing ring; the height of the closestool is changed by changing the flushing ring with different heights) by changing the structure of the flushing ring according to the actual requirement without changing the structure of the closestool basin;
(5) the left and right parts of the closestool of the utility model can be used universally; the utility model provides a closestool spare part bilateral symmetry, the piece about same part can be adorned according to the demand, has certain flexibility, reduces the installation degree of difficulty.
Drawings
Fig. 1 is a schematic view of the vacuum toilet of the present invention.
Fig. 2 is a schematic view of the vacuum toilet of the present invention.
Fig. 3 is a cross-sectional view of a discharge valve with a control function.
Figure 4 is a cross-sectional view of a back siphon assembly.
Fig. 5 is a partial sectional view of a toilet bowl drain.
Fig. 6 is a cross-sectional view of a drain outlet of the drain valve.
Fig. 7 is a bottom view of the rinse ring spray head.
In the figure, 1-flushing ring, 2-quick-release pin, 3-valve gland, 4-drain pipe II, 5-flushing ring fixing block, 6-rubber pad, 7-back siphon component, 8-flushing valve bracket, 9-flushing valve, 9.1-flushing valve lower shell, 10-discharge valve, 11-screw, 12-fixing piece, 13-flushing ring nozzle, 14-toilet bracket, 14.1-toilet left bracket, 14.2-toilet right bracket, 15-toilet bowl, 16-drain pipe I, 17-electric mechanism component, 18-inserted bar, 19-control board component shell, 20-socket hole, 21-control board, 22-valve component, 23-control board component, 24-flushing hole, 25-back siphon component shell, 25.1-a first cavity, 25.2-a second cavity, 26-a valve cap, 27-a valve core, 28-a spring, 29-a sealing ring, 30-a sealing ring, 31-a flushing hole and 32-a toilet bowl sewage discharge port.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily appreciated by the description.
In the description of the present invention, it should be understood that the terms "left and right", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.
With reference to the accompanying drawings: a nonmetal vacuum closestool for aviation comprises a flushing ring 1, a drain pipe II 4, a flushing valve 9 with a back siphon function, a discharge valve 10 with a control function, a flushing ring spray head 13, a closestool support 14, a closestool basin 15 and a drain pipe I16;
the toilet bowl 15 is arranged at the upper end of the toilet bracket 14; the flushing ring 1 is positioned on the toilet bowl 15; the flushing ring spray head 13 is fixed on the flushing ring 1;
the flushing valve 9 is connected with the flushing ring 1 through a back siphon assembly shell 25; the flushing valve 9 is connected with the toilet seat bracket 14 through the flushing valve bracket 8;
the discharge valve 10 is connected to the toilet bracket 14 by screws;
one end of the drain pipe I16 is directly butted with a drain outlet 32 of the toilet bowl, and the other end of the drain pipe I is connected with the drain valve 10 through four screws on the drain valve 10;
the drain pipe ii 4 is connected to a drain valve 10 (shown in fig. 1 and 2).
Further, the whole closestool bracket is fixed on the floor through four screws;
the toilet seat support 14 is divided into a toilet seat left support 14.1 and a toilet seat right support 14.2, and the toilet seat left support 14.1 and the toilet seat right support 14.2 are fixed through three screws;
the toilet left bracket 14.1 and the toilet right bracket 14.2 are symmetrically arranged, and the sewage discharge pipe orifice can be arranged on the left side or the right side according to actual needs.
Furthermore, the contact surface of the flushing ring spray head 13 and the flushing ring 1 is fully coated with sealant to ensure the sealing property;
a circle of flushing holes 31 (shown in fig. 1, 2 and 7) are uniformly arranged on the flushing ring spray head 13; the flushing ring spray head is fixed at the bottom of the flushing ring 1 through eight screws, fifty-four flushing holes are uniformly distributed on the spray head, and other numbers of flushing holes can be uniformly distributed according to actual conditions.
Furthermore, Teflon is sprayed on the inner surface of the toilet bowl 15, so that the surface is smooth and is not easy to adhere.
The flushing valve 9 is essentially an electromagnetic valve, which is closed when energized and opened when de-energized, and closed when de-energized.
Further, the back siphon assembly 7 comprises a flushing port 24, a back siphon assembly housing 25, a valve cap 26, a valve core 27, a spring 28, a sealing ring 29 and a sealing ring 30;
the flushing port 24 is positioned at the side end of the back siphon assembly shell 25 and is connected with the flushing ring 1;
a first cavity 25.1 and a second cavity 25.2 are arranged in the back siphon component shell 25; the first cavity 25.1 is located above the second cavity 25.2;
the first cavity 25.1 is communicated with the flushing port 24;
a valve cap 26 is arranged at the top of the first cavity 25.1, and a valve core 27 is arranged in the middle; the spring 28 is arranged at the bottom of the valve core 27 and is positioned at the bottom of the first cavity 25.1;
a sealing ring 29 is arranged on top of the second cavity 25.2;
the second cavity 25.2 is communicated with the interior of the lower shell 9.1 of the flushing valve; when the flushing valve 9 is opened, the valve core 27 is pushed to the bottom of the valve cap 26 by pressure water, and the first cavity 25.1 forms a negative pressure cavity; when the flushing valve 9 is closed, the valve core 27 is separated from the valve cap 26, the negative pressure cavity formed by the first cavity 25.1 disappears, and the water in the back siphon assembly 7 can be discharged through the flushing ring nozzle 13 and the flushing valve 9 (as shown in fig. 1, 2 and 4).
Furthermore, a sealing ring 30 is arranged at the joint of the drain pipe I16 and the drain valve to ensure the sealing performance; the toilet bowl sewage draining port 32 is directly inserted into the water draining pipe I, two sealing grooves are formed in the toilet bowl sewage draining port 32, the sealing rings 30 are arranged in the sealing grooves, the sealing effect is guaranteed by the two sealing rings, and the assembling and disassembling time is reduced;
a sealing ring 30 is arranged at the joint of the drain pipe II 4 and the drain valve 10 to ensure the sealing property;
the drain pipe ii 4 is fixed to the drain valve 10 through the valve cover 3 (see fig. 1, 2, 5, and 6).
Furthermore, the flushing ring fixing blocks 5 are fixed on the flushing ring 1 through screws 11, the flushing ring fixing blocks 5 are fixed on the toilet bracket 14 through quick-release pins 2, and the flushing ring 1 is fixed on the toilet bracket 14 through two flushing ring fixing blocks 5 and two fixing pieces 12; a rubber pad 6 is arranged between the flushing ring fixing block 5 and the toilet bracket 14;
the flushing valve bracket 8 is connected with the toilet bracket 14 through the quick release pin 2; the back siphon component 7 is fixed at the upper end of the flushing valve bracket 8 through a screw 29, and the flushing valve 9 is fixed at the lower end of the flushing valve bracket 8 through a screw; the back siphon component 7 is communicated with a flushing valve 9; the flushing valve is a flushing valve with a back siphon function, and the back siphon component is a part of the flushing valve;
one side of the discharge valve 10 is connected with the toilet bracket 14 through a screw, and the other side is connected with the toilet bracket 14 through an insert rod 18;
the drain pipe II 4 is connected with a drain valve 10 through a valve gland 3 and four screws 11;
the back siphon assembly 7 is connected with the flush ring 1, the flush valve holder 8 and the lower flush valve housing 9.1 by screws 11, respectively (as shown in fig. 1 and 2).
Further, the discharge valve 10 includes an electric mechanism assembly 17, a shutter disk assembly 22, and a control board assembly 23; the electric mechanism assembly 17 and the control panel assembly 23 are integrated in the toilet controller shell; the structure of the closestool is simplified, the weight of the product is reduced, and the electromagnetic compatibility is improved;
the shutter disk assembly 22 is arranged at one end of the control board assembly shell 19;
the control board is fixed at the bottom of the control board assembly shell 19, and the socket hole 20 is positioned at the right end of the control board assembly shell 19;
the inserted rod 18 is arranged at the upper end of the control board assembly shell 19; the control board assembly housing 19 is connected to the toilet seat 14 through the insertion rod (as shown in fig. 1, 2, and 3), and is easy to assemble and disassemble.
In order to clearly illustrate the advantages of the non-metal vacuum toilet for aviation compared with the prior art, the two technical solutions are compared by the staff, and the comparison results are as follows:
according to last table, nonmetal vacuum closestool for aviation compare with prior art, the material adopts non-metallic material, light in weight, closestool height-adjustable, electromagnetic compatibility is good.
Examples
As shown in fig. 1 and 2, a toilet bracket 14 is bilaterally symmetrical and consists of a left part and a right part, the bracket 14 can be fixed by four screws 11, a toilet bowl 15 is placed on the upper part of the toilet bracket 14, a flushing ring 1 is placed on the toilet bowl 15, a flushing ring fixing block 5 is fixed with the flushing ring 1 by two screws 11, then the fixing block 5 is connected with the toilet bracket 14 by two quick-release pins 2, a rubber pad 6 is arranged between the fixing block 5 and the bracket 14, the flushing ring 1 is fixed on the toilet bracket 14 by a fixing sheet 12, a back siphon assembly 7 is connected with the flushing ring 1 by two screws 11, the back siphon assembly 7, a flushing valve housing 9.1 and a flushing valve bracket 8 are connected by three screws 11, the flushing valve bracket 8 is connected with the toilet bracket 14 by two quick-release pins 2, a discharge valve 10 is connected with the toilet bracket 14 by screws 11, one end of a drain pipe I16 is directly butted with a toilet bowl sewage discharge port 32, the other end is connected with a discharge valve 10 through four screws 11 on the discharge valve 10, and a drain pipe II 4 is connected with the discharge valve 10 through a valve gland 3 and the four screws 11.
As shown in fig. 3, the discharge valve motor assembly 17 is integrated with the control board assembly 23 in the control board assembly housing 19, the control board 21 is fixed at the bottom, the socket hole 20 is located at the right end of the control board assembly housing 19, and the control board assembly housing 19 is connected with the toilet stand 14 through the insert rod 18.
As shown in FIG. 4, the flushing port 24 needs to be inserted into the corresponding hole of the flushing ring 1, the bottom is communicated with the inside of the lower shell 9.1 of the flushing valve, the sealing ring 29 is contacted with the electromagnet inside the lower shell 9.1 of the flushing valve to achieve the sealing effect, the top is fixed with a valve cap 26, the middle is provided with a valve core 27, the valve core 27 can move up and down, the bottom of the valve core 27 is provided with a spring 28, after the flushing valve 9 is electrified, the valve core 27 is pushed to the bottom of the valve cap 26 by pressure water, after the power is off, the valve core 27 is separated from the valve cap 26 to be contacted with the valve cap 26 and floats on the water, the air enters the back siphon assembly 7 through the hole on the valve cap 26, and the water in the valve flows through the water outlet 24 and the flushing ring nozzle 13 and then is discharged into the toilet bowl 15.
As shown in FIG. 5, a sealing ring 30 is arranged at the joint of the drain pipe I16 and the drain valve 10 to ensure the sealing performance, a sealing ring 30 is arranged at the joint of the drain pipe II 4 and the drain valve 10 to ensure the sealing performance, and the drain pipe II 4 is fixed on the drain valve 10 by a valve cover 3.
As shown in figure 6, the toilet bowl sewage outlet 32 is directly inserted into the drain pipe I16 and has a quick-release effect, and the sewage outlet is provided with two sealing grooves, so that the sealing effect is ensured by using two sealing rings 30.
As shown in fig. 7, the flushing ring nozzle 13 is fixed on the flushing ring 1 through eight screws 11, the contact surface between the flushing ring nozzle 13 and the flushing ring 1 is coated with a sealing glue, and fifty-four flushing holes 31 are uniformly distributed on the flushing ring nozzle 13 to ensure the flushing effect.
And (4) conclusion: this embodiment compact structure is simple, adopts combined material, light in weight, and each part passes through bolted connection, the dismouting of being convenient for, can satisfy different position demands, closestool height-adjustable through less change, and the closestool is controlled the piece and can be general, have certain flexibility, with circuit board and motor integration together, electromagnetic compatibility is better.
Other parts not described belong to the prior art.
Claims (7)
1. The utility model provides an aviation is with nonmetal vacuum closestool which characterized in that: comprises a flushing ring (1), a drain pipe II (4), a flushing valve (9), a discharge valve (10), a flushing ring spray head (13), a closestool bracket (14), a closestool basin and a drain pipe I (16);
the toilet bowl (15) is arranged on the toilet bracket (14); the flushing ring (1) is positioned on the toilet bowl (15); the flushing ring spray head (13) is fixed on the flushing ring (1);
the flushing valve (9) is connected with the flushing ring (1) through a back siphon component shell (25) and is connected with the closestool support (14) through a flushing valve support (8);
the discharge valve (10) is connected with the toilet bracket (14);
one end of the drain pipe I (16) is butted with a drain outlet (32) of the toilet bowl, and the other end is connected with the drain valve (10);
the drain pipe II (4) is connected with the drain valve (10).
2. The nonmetallic vacuum toilet of claim 1, wherein: the closestool bracket (14) is connected with the floor;
the closestool support (14) comprises a closestool left support (14.1) and a closestool right support (14.2), and the closestool left support (14.1) and the closestool right support (14.2) are fixed through screws;
the left closestool support (14.1) and the right closestool support (14.2) are symmetrically arranged.
3. The nonmetallic vacuum toilet of claim 2, wherein: a circle of flushing holes (31) are arranged on the flushing ring spray head (13).
4. The nonmetallic vacuum toilet of claim 3, wherein: the back siphon assembly (7) comprises a flushing port (24), a back siphon assembly shell (25), a valve cap (26), a valve core (27), a spring (28), a sealing ring (29) and a sealing ring (30);
the flushing port (24) is positioned at the side end of the shell (25) of the back siphon component and is connected with the flushing ring (1);
a first cavity (25.1) and a second cavity (25.2) are arranged in the back siphon component shell (25); the first cavity (25.1) is positioned above the second cavity (25.2);
the first cavity (25.1) is communicated with the flushing port (24);
the top of the first cavity (25.1) is provided with a valve cap (26) and the middle is provided with a valve core (27); the spring (28) is arranged at the bottom of the valve core (27) and is positioned at the bottom of the first cavity (25.1);
the sealing ring (29) is arranged on the top of the second cavity (25.2).
5. The nonmetallic vacuum toilet of claim 4, wherein: a sealing ring (30) is arranged at the joint of the drain pipe I (16) and the drain valve (10); two sealing grooves are arranged at the sewage outlet (32) of the toilet bowl, and sealing rings (30) are arranged in the sealing grooves;
a sealing ring (30) is arranged at the joint of the drain pipe II (4) and the drain valve (10);
the drain pipe II (4) is fixed on the drain valve (10) through the valve gland (3).
6. The nonmetallic vacuum toilet of claim 5, wherein: the flushing ring fixing block (5) is fixed on the flushing ring (1) through a screw (11), the flushing ring fixing block (5) is fixed on the closestool support (14) through a quick-release pin (2), and the flushing ring (1) is fixed on the closestool support (14) through the flushing ring fixing block (5) and a fixing piece (12); a rubber pad (6) is arranged between the flushing ring fixing block (5) and the closestool bracket (14);
the flushing valve bracket (8) is connected with a closestool bracket (14) through a quick-release pin (2); the back siphon component (7) is fixed at the upper end of the flushing valve bracket (8) through a screw, and the flushing valve (9) is fixed at the lower end of the flushing valve bracket (8) through a screw; the back siphon component (7) is communicated with the flushing valve (9);
one side of the discharge valve (10) is connected with the toilet bracket (14) through a screw (11), and the other side is connected with the toilet bracket (14) through an inserted link (18).
7. The nonmetallic vacuum toilet of claim 6, wherein: the discharge valve (10) comprises an electric mechanism assembly (17), a valve disc assembly (22) and a control plate assembly (23); the electric mechanism assembly (17) and the control board assembly (23) are integrated in the control board assembly shell (19); the shutter disk assembly (22) is arranged at one end of the control panel assembly shell (19);
the control board (21) is fixed at the bottom of the control board assembly shell (19), and the socket hole (20) is positioned at the right end of the control board assembly shell (19);
the inserted bar (18) is arranged at the upper end of the control panel component shell (19); the control panel component shell (19) is connected with the closestool bracket (14) through the inserted bar (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121603107.7U CN215245545U (en) | 2021-07-14 | 2021-07-14 | Nonmetal vacuum closestool for aviation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121603107.7U CN215245545U (en) | 2021-07-14 | 2021-07-14 | Nonmetal vacuum closestool for aviation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215245545U true CN215245545U (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121603107.7U Active CN215245545U (en) | 2021-07-14 | 2021-07-14 | Nonmetal vacuum closestool for aviation |
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| Country | Link |
|---|---|
| CN (1) | CN215245545U (en) |
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2021
- 2021-07-14 CN CN202121603107.7U patent/CN215245545U/en active Active
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