CN108167164A - A kind of split type double cylinder inflators - Google Patents
A kind of split type double cylinder inflators Download PDFInfo
- Publication number
- CN108167164A CN108167164A CN201711474759.3A CN201711474759A CN108167164A CN 108167164 A CN108167164 A CN 108167164A CN 201711474759 A CN201711474759 A CN 201711474759A CN 108167164 A CN108167164 A CN 108167164A
- Authority
- CN
- China
- Prior art keywords
- pedestal
- piston
- cylinder
- air
- spool
- Prior art date
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B33/00—Pumps actuated by muscle power, e.g. for inflating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
- F04B39/122—Cylinder block
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Tires In General (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses a kind of split type double cylinder inflators, the lower end that outlet pedestal tube is connected on its pedestal is connected with the air reservoir coordinated with pedestal dismounting, the upper end of pedestal is provided with the main piston type air-inflator component for including piston-cylinder, inlet channel is provided on pedestal, non-return valve is provided in the inlet channel；The spool being rotatably assorted with pedestal is provided on pedestal, is switched by rotational valve core completion status, inflate state when, piston-cylinder and air outlet pipe are connected by inflate hole, the centre bore of spool；During gas storage state, piston-cylinder and air reservoir are connected by the gas storage hole of spool；During high pressure outlet air, piston-cylinder and air outlet pipe are connected by venthole, the centre bore of spool, and after air reservoir is dismantled, as pedestal, rotational valve core switches to the state of inflating, can normally inflate for pedestal landing.It the advantage is that：It is rational in infrastructure, it disclosure satisfy that the tonifying Qi demand of conventional tyre and vacuum tire, and height can be adjusted by dismantling air reservoir, collect, is easy to carry.
Description
Technical field
The present invention relates to inflator manufacturing technology field, a kind of especially split type double cylinder inflators.
Background technology
Bicycle tyre can be divided into air tyre and solid tyre, and solid tyre is (without tonifying Qi) although easy to maintain, but rides
Impression can not show a candle to air tyre；Air tyre can be divided into the conventional tyre with the inner tube of a tyre and the vacuum tire without the inner tube of a tyre, ordinary wheel again
Tire economy is higher, therefore most commonly used, but conventional tyre heavier-weight and repairing trouble, and vacuum tire is with resistance to
The good, puncture resistant of mill property, it is light and handy, easy to maintenance the advantages that, and increasingly by the welcome of consumer and like.
Conventional tyre, the inner tube of a tyre are obturators, are easier by gas nozzle (non-return valve) tonifying Qi, no matter by air pump also
It is that common household inflator can be easily accomplished tonifying Qi.And vacuum tire does not have the presence of obturator, in the tonifying Qi incipient stage,
Need rapidly tonifying Qi that can just make to form hermetic seal between tire and wheel hub, and existing inflator is since its air pressure is limited, very
Difficult outlets a large amount of in a short time, thus it is extremely difficult to vacuum tire tonifying Qi, and this is also the difficulty of vacuum tire large-scale popularization
One of.
Invention content
The technical problem to be solved by the invention for the present situation of prior art is to provide rational in infrastructure, manufacture is at low cost,
Using, collection, the split type double cylinder inflators of one kind easy to carry, the tonifying Qi of conventional tyre and vacuum tire disclosure satisfy that
Demand.
Technical solution is used by the present invention solves above-mentioned technical problem：
A kind of split type double cylinder inflators, include pedestal, be connected on the pedestal outlet pedestal tube lower end be connected with
The air reservoir of pedestal dismounting cooperation, the upper end of pedestal are provided with the main piston type air-inflator component for including piston-cylinder, pedestal
On be provided with inlet channel, be provided with non-return valve in the inlet channel；The spool being rotatably assorted with pedestal is provided on pedestal, is led to
Cross rotational valve core completion status switching, inflate state when, piston-cylinder and air outlet pipe are connected by spool；It is living during gas storage state
Piston cylinder and air reservoir are connected by spool；During high pressure outlet air, piston-cylinder and air outlet pipe are connected by spool；Air reservoir is torn open
After unloading, as pedestal, rotational valve core switches to the state of inflating, can normally inflate for pedestal landing.
The technical measures of optimization further include：
Venthole is offered on above-mentioned spool, inflates hole and gas storage hole, gas storage hole extends radially through spool, venthole and inflates
Hole is tunneled to centre bore respectively, and passes through centre bore and be connected, and centre bore is connected with the air outlet pipe.
Above-mentioned piston type air-inflator component includes piston-cylinder, outer tube, piston non-return valve and piston rod, piston-cylinder
Lower end be connected with the piston-cylinder locking cap being fixed on pedestal, the upper end is connected with piston non-return valve, under outer tube
End is provided with outer tube sliding sleeve, and the upper end is connected with handle, and the lower end of piston rod is provided with piston, and the upper end passes through piston non-return valve
It is connected with handle.
Pressure gauge is provided on above-mentioned pedestal, which is connected with the air outlet pipe.
Turning handle is connected on above-mentioned spool, the spring retainer ball being adapted with the turning handle is provided on pedestal.
Limiting slot is provided on above-mentioned spool, the banking pin being adapted with the limiting slot is provided on pedestal.
Above-mentioned pedestal is hinged with foot-operated.
Above-mentioned riding is provided with the card slot being adapted with the gas nozzle in air outlet pipe.
The upper end of above-mentioned air reservoir is provided with top cover labyrinth, and lower end is provided with lower sealing cover, is connected in lower sealing cover
There is foot pedal.
Above-mentioned pedestal is provided with air outlet pipe connection-peg, and bur, air outlet pipe are provided on the outer wall of the air outlet pipe connection-peg
Lock sleeve is provided with outside connection-peg.
A kind of split type double cylinder inflators of the invention, rational in infrastructure, manufacture is at low cost, and upper part is mainly includes piston
The piston type air-inflator component of cylinder, lower part is dismountable air reservoir, so as to form two cylinder arrangement, passes through rotational valve core reality
Switching between present condition, using simple, conveniently；When commonly inflating, the height of inflator can be adjusted by dismantling air reservoir,
To meet the use demand of different children.Inflate state when, the gas in piston-cylinder is directly exported from air outlet pipe, can be met general
The tonifying Qi demand of logical tire；During gas storage state, the gas in piston-cylinder enters air reservoir and carries out gas storage supercharging, is vacuum tire
Tonifying Qi is prepared；During high pressure outlet air, the high pressure air pressure in air reservoir is exported from air outlet pipe, to meet vacuum tire tonifying Qi demand；
This inflator disclosure satisfy that the tonifying Qi demand of conventional tyre and vacuum tire.
Description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention；
Fig. 2 is the decomposition diagram of the present invention；
Fig. 3 is the decomposition diagram of pedestal in Fig. 2；
Fig. 4 is the sectional structure chart of the present invention；
Fig. 5 is A portions enlarged drawing in Fig. 4 when the present invention inflates；
A portions enlarged drawing in Fig. 4 when Fig. 6 is gas storage of the present invention；
A portions enlarged drawing in Fig. 4 when Fig. 7 is high pressure outlet air of the present invention；
Fig. 8 is B portions enlarged drawing in Fig. 4；
Fig. 9 is that the present invention unloads the usage state diagram after air reservoir；
Figure 10 is that the present invention unloads the sectional structure chart after air reservoir；
Figure 11 is C portions enlarged drawing in Figure 10.
Specific embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
Structure diagram for the present invention as shown in Figure 1 to 11,
Reference numeral therein is：Pedestal 1, inlet channel 1a, air outlet pipe connection-peg 11, bur 11a, lock sleeve 12, air outlet pipe
2nd, gas nozzle 21, air reservoir 3, sealing cover 31, foot pedal 33, butterfly screws 34, piston type air-inflator component 4, piston-cylinder 41, outer
Pipe 42, piston non-return valve 43, piston rod 44, piston-cylinder locking cap 45, outer tube sliding sleeve 46, handle 47, piston 48, non-return valve 5,
Spool 6, venthole 6a, hole 6b, gas storage hole 6c, centre bore 6d, limiting slot 6e, turning handle 61, spring retainer ball 62, banking pin are inflated
63rd, pressure gauge 7, screw plug 71, foot-operated 8, card slot 81.
As shown in Figure 1 to 11,
A kind of split type double cylinder inflators, include pedestal 1, and the lower end connection of 2 pedestal 1 of air outlet pipe is connected on the pedestal 1
There is the air reservoir 3 with the dismounting cooperation of pedestal 1, the upper end of pedestal 1 is provided with the main piston type air-inflator for including piston-cylinder 41
Component 4 is provided with inlet channel 1a on pedestal 1, non-return valve 5 is provided in inlet channel 1a；It is provided on pedestal 1 and pedestal
1 spool 6 being rotatably assorted, by 6 completion status of rotational valve core switch, inflate state when, piston-cylinder 41 and air outlet pipe 2 pass through
Spool 6 is connected；During gas storage state, piston-cylinder 41 and air reservoir 3 are connected by spool 6；During high pressure outlet air, 41 He of piston-cylinder
Air outlet pipe 2 is connected by spool 42；After air reservoir 3 is dismantled, for the landing of pedestal 1 as pedestal, rotational valve core 6, which switches to, inflates shape
State can normally inflate.
Venthole 6a is offered on spool 6, inflates hole 6b and gas storage hole 6c, gas storage hole 6c extends radially through spool 6, outlet
Hole 6a and the hole 6b that inflates are tunneled to centre bore 6d, and pass through centre bore 6d and be connected respectively, centre bore 6d and 2 phase of air outlet pipe
Connection.
The upper piston formula of this split type double cylinder inflator inflates cartridge module 4 and existing piston type air-inflator structure phase
Seemingly；Piston type air-inflator shows money or valuables one carries unintentionally structure (i.e. handle connection outer tube, outer tube movement, and piston is motionless) and the structure that above shows money or valuables one carries unintentionally under having
(i.e. handle connection piston rod, piston motion is driven by piston rod, and outer tube is motionless), in the case where inflator length is identical,
Under show money or valuables one carries unintentionally structure relatively on the structure that shows money or valuables one carries unintentionally possess longer effective travel, play more efficient.
In the present embodiment, show money or valuables one carries unintentionally structure under the use of piston type air-inflator component 4, including piston-cylinder 41, outer tube 42, lives
Plug non-return valve 43 and piston rod 44, the lower end of piston-cylinder 41 are connected with the piston-cylinder locking cap 45 being fixed on pedestal 1
It connects, the upper end is connected with piston non-return valve 43, and the lower end of outer tube 42 is provided with outer tube sliding sleeve 46, and the upper end is connected with handle
47, the lower end of piston rod 44 is provided with piston 48, and the upper end is connected across piston non-return valve 43 with handle 47.
Above-mentioned piston type air-inflator component 4 shows money or valuables one carries unintentionally under common on the basis of structure, is improved, in piston gas
The piston rod 44 that setting is connected with handle 47 in cylinder 41, is equivalent to the structure that shows money or valuables one carries unintentionally by and is incorporated into down in the structure that shows money or valuables one carries unintentionally, in this way
It can improve and inflate pressure, efficiency is inflated in raising.
Certainly, piston type air-inflator component 4 can also replace above-mentioned piston type air-inflator group using structure is above showed money or valuables one carries unintentionally
4 structure of part.
In embodiment, pressure gauge 7 is provided on pedestal 1, which is connected with the air outlet pipe 2.Pressure gauge 7 with
The channel outer end that air outlet pipe 2 is connected is provided with screw plug 71.
In embodiment, turning handle 61 is connected on spool 6, the spring limit being adapted with the turning handle 61 is provided on pedestal 1
Position ball 62.
In embodiment, limiting slot 6e is provided on spool 6, the limit being adapted with the limiting slot 6e is provided on pedestal 1
Position nail 63.
The setting of turning handle 61 facilitates the rotation of spool 6, and the cooperation of limiting slot 6e and banking pin 63 limits the axis of spool 6
To displacement, the accuracy of assembly relation between component ensure that；And the setting of spring retainer ball 62, facilitate its positioning, and have
Good feel, usage experience is more preferably.
In embodiment, pedestal 1 is hinged with foot-operated 8.
In embodiment, the card slot 81 being adapted with the gas nozzle 21 in air outlet pipe 2 is provided on foot-operated 8.
When being inflated after air reservoir 3 is dismantled, foot-operated 8 were fallen, slam foot-operated 8 with foot is had an effect with facilitating；It is beating
When inflator is stored, gas nozzle 21 is caught in foot-operated 8 card slot 81, facilitates the storage of air outlet pipe 2, facilitates the receipts of inflator
It hides, carry.
In embodiment, the upper end of air reservoir 3 is provided with top cover labyrinth 31, and lower end is provided with lower sealing cover 32, lower sealing
Foot pedal 33 is connected on lid 32.Top cover labyrinth 31 is fixed with 1 phase of pedestal, and air reservoir 3 is threadedly coupled with top cover labyrinth 31, is ridden
Plate 33 is fixed by butterfly screws 34 and 31 phase of sealing cover.
In embodiment, pedestal 1 is provided with air outlet pipe connection-peg 11, and bur is provided on the outer wall of the air outlet pipe connection-peg 11
11a, air outlet pipe connection-peg 11 are provided with lock sleeve 12 outside.
The setting of 11 outer wall bur 11a of lock sleeve 12 and air outlet pipe connection-peg, can ensure between air outlet pipe 2 and pedestal 1
The reliability of connection.
Operation principle：
This inflator can both give conventional tyre tonifying Qi, can also give vacuum tire tonifying Qi.
The top of this inflator is the main piston type air-inflator component 4 for including piston-cylinder 41, and lower part is air reservoir 3,
So as to form two cylinder arrangement；And air reservoir 3 coordinates with the dismounting of pedestal 1, facilitates the collection of inflator, carries, and also saves
Packing cost.The top of this inflator implements a kind of interior booster inflater, large-minded, and air pressure is high, compact, interior supercharging gas
The 3 higher pressure of air reservoir and gas-storing capacity of lower part are capable of in the use of cylinder.Piston rod 44 and outer tube 42 are driven by handle 47
It is reciprocating, and the gas in piston-cylinder 41 is conveyed outward；And the air reservoir 3 added can be by institute in piston-cylinder 41
Output gas temporarily stores, and makes disposably to discharge the tonifying Qi demand to meet vacuum tire after its pressure increase.
Switch inflator state by rotating turning handle 61 with the rotation of movable valve plug 6：Spool 6 often rotates 90 ° and completes once
The switching of state；The corresponding position of each state can be identified on pedestal 1 to facilitate identification.
As shown in figure 5, when inflating, piston-cylinder 41 through inlet channel 1a, non-return valve 5, inflate hole 6b, centre bore 6d with going out
Tracheae 2 forms air outlet passage, and gas storage hole 6c, venthole 6a are blocked；The gas that piston-cylinder 41 exports is directly defeated from air outlet pipe 2
Go out, air reservoir 3 does not work, and conventional tyre tonifying Qi can be given under the state.As shown in figure 9, when inflating state, can will store up
Cylinder 3 unloads, and meets the use demand of children to adjust the height of inflator.
As shown in fig. 6, during gas storage, piston-cylinder 41 is formed through inlet channel 1a, non-return valve 5, gas storage hole 6c and air reservoir 3
Gas storage access, and inflate hole 6b, venthole 6a and be blocked；The gas that piston-cylinder 41 exports enters air reservoir 3 and carries out gas storage supercharging,
To get ready to vacuum tire tonifying Qi.
As shown in fig. 7, during high pressure outlet air, air reservoir 3 forms air outlet passage through venthole 6a, centre bore 6d and air outlet pipe 2,
And gas storage hole 6c, the hole 6b that inflates are blocked；High pressure gas in air reservoir 3 is exported from air outlet pipe 2, can be vacuum under the state
Tire tonifying Qi.
Highly preferred embodiment of the present invention has illustrated, and the various change or remodeling made by those of ordinary skill in the art are not
It can depart from the scope of the present invention.
Claims (10)
1. a kind of split type double cylinder inflators, include pedestal (1), air outlet pipe (2), feature are connected on the pedestal (1)
It is：The lower end of the pedestal (1) is connected with the air reservoir (3) with pedestal (1) dismounting cooperation, the upper end of the pedestal (1)
The main piston type air-inflator component (4) for including piston-cylinder (41) is provided with, the pedestal is provided with inlet channel on (1)
(1a), the inlet channel (1a) is interior to be provided with non-return valve (5)；It is provided with what is be rotatably assorted with pedestal (1) on the pedestal (1)
Spool (6), by rotational valve core (6) completion status switch, inflate state when, piston-cylinder (41) and air outlet pipe (2) pass through valve
Core (6) is connected；During gas storage state, piston-cylinder (41) and air reservoir (3) are connected by spool (6)；During high pressure outlet air, piston gas
Cylinder (41) and air outlet pipe (2) are connected by spool (42)；After air reservoir (3) is dismantled, pedestal (1) landing is as pedestal, rotation
Spool (6) switches to the state of inflating, and can normally inflate.
2. the split type double cylinder inflators of one kind according to claim 1, it is characterized in that：It is opened up on the spool (6)
There is venthole (6a), inflate hole (6b) and gas storage hole (6c), the gas storage hole (6c) extends radially through spool (6), described
It venthole (6a) and inflates hole (6b) and is tunneled to centre bore (6d) respectively, and pass through centre bore (6d) and be connected, the center
Hole (6d) is connected with the air outlet pipe (2).
3. the split type double cylinder inflators of one kind according to claim 2, it is characterized in that：Piston type air-inflator component (4)
Including piston-cylinder (41), outer tube (42), piston non-return valve (43) and piston rod (44), under the piston-cylinder (41)
It holds and is connected with the piston-cylinder locking cap (45) being fixed on pedestal (1), the upper end is connected with piston non-return valve (43), institute
The lower end of outer tube (42) stated is provided with outer tube sliding sleeve (46), and the upper end is connected with handle (47), the piston rod (44)
Lower end is provided with piston (48), and the upper end is connected across piston non-return valve (43) with handle (47).
4. the split type double cylinder inflators of one kind according to claim 3, it is characterized in that：It is set on the pedestal (1)
There is pressure gauge (7), which is connected with the air outlet pipe (2).
5. the split type double cylinder inflators of one kind according to claim 4, it is characterized in that：It is connected on the spool (6)
There is turning handle (61), the spring retainer ball (62) being adapted with the turning handle (61) is provided on the pedestal (1).
6. the split type double cylinder inflators of one kind according to claim 5, it is characterized in that：It is set on the spool (6)
There is limiting slot (6e), the banking pin (63) being adapted with the limiting slot (6e) is provided on the pedestal (1).
7. the split type double cylinder inflators of one kind according to claim 6, it is characterized in that：The pedestal (1) is hinged with
Foot-operated (8).
8. the split type double cylinder inflators of one kind according to claim 7, it is characterized in that：It is set on foot-operated (8)
There is the card slot (81) being adapted with the gas nozzle (21) in air outlet pipe (2).
9. the split type double cylinder inflators of one kind according to claim 8, it is characterized in that：The air reservoir (3) it is upper
End is provided with top cover labyrinth (31）, lower end is provided with lower sealing cover (32), is connected in the lower sealing cover (32) foot-operated
Plate (33).
10. the split type double cylinder inflators of one kind according to claim 9, it is characterized in that：The pedestal (1) is provided with
Air outlet pipe connection-peg (11) is provided with bur (11a), the air outlet pipe connection-peg on the outer wall of the air outlet pipe connection-peg (11)
(11) lock sleeve (12) is provided with outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711474759.3A CN108167164B (en) | 2017-12-29 | 2017-12-29 | A kind of split type double cylinder inflators |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711474759.3A CN108167164B (en) | 2017-12-29 | 2017-12-29 | A kind of split type double cylinder inflators |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108167164A true CN108167164A (en) | 2018-06-15 |
| CN108167164B CN108167164B (en) | 2019-06-25 |
Family
ID=62519833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711474759.3A Active CN108167164B (en) | 2017-12-29 | 2017-12-29 | A kind of split type double cylinder inflators |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108167164B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203124U (en) * | 1987-03-31 | 1988-01-06 | 陈雅华 | Frozen free double layer high pressure type pump |
| CN2126325U (en) * | 1991-09-16 | 1992-12-30 | 翟伯平 | Staging type high-pressure inflator |
| CN201422356Y (en) * | 2009-05-07 | 2010-03-17 | 蒋涵民 | Suffocation bag |
| CN103912478A (en) * | 2013-01-09 | 2014-07-09 | 双馀实业有限公司 | Inflating device with air storage barrel |
| TWM545839U (en) * | 2017-04-17 | 2017-07-21 | 雙餘實業股份有限公司 | Air pump and its air storage cylinder, switch valve, and switch valve core |
-
2017
- 2017-12-29 CN CN201711474759.3A patent/CN108167164B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87203124U (en) * | 1987-03-31 | 1988-01-06 | 陈雅华 | Frozen free double layer high pressure type pump |
| CN2126325U (en) * | 1991-09-16 | 1992-12-30 | 翟伯平 | Staging type high-pressure inflator |
| CN201422356Y (en) * | 2009-05-07 | 2010-03-17 | 蒋涵民 | Suffocation bag |
| CN103912478A (en) * | 2013-01-09 | 2014-07-09 | 双馀实业有限公司 | Inflating device with air storage barrel |
| TWM545839U (en) * | 2017-04-17 | 2017-07-21 | 雙餘實業股份有限公司 | Air pump and its air storage cylinder, switch valve, and switch valve core |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108167164B (en) | 2019-06-25 |
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