CN110124157A - Double pressure needleless injectors - Google Patents
Double pressure needleless injectors Download PDFInfo
- Publication number
- CN110124157A CN110124157A CN201910477731.8A CN201910477731A CN110124157A CN 110124157 A CN110124157 A CN 110124157A CN 201910477731 A CN201910477731 A CN 201910477731A CN 110124157 A CN110124157 A CN 110124157A
- Authority
- CN
- China
- Prior art keywords
- piston
- chamber
- intercommunicating pore
- cylinder
- rod
- 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.)
- Granted
Links
- 239000011148 porous material Substances 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims description 19
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000000994 depressogenic effect Effects 0.000 claims description 8
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 239000003814 drug Substances 0.000 abstract description 6
- 229940079593 drug Drugs 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 206010033675 panniculitis Diseases 0.000 description 3
- 210000004304 subcutaneous tissue Anatomy 0.000 description 3
- 210000001519 tissue Anatomy 0.000 description 3
- 210000002615 epidermis Anatomy 0.000 description 2
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 102000004877 Insulin Human genes 0.000 description 1
- 108090001061 Insulin Proteins 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229940125396 insulin Drugs 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/48—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for varying, regulating, indicating or limiting injection pressure
- A61M5/482—Varying injection pressure, e.g. by varying speed of injection
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/19—Constructional features of carpules, syringes or blisters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention relates to needleless injector technical fields, especially a kind of double pressure needleless injectors, including being used to provide power the Power Component for pushing medical fluid to form high pressure liquid stream, which includes: cylinder inner cylinder, there is plunger shaft, running through in plunger shaft has intercommunicating pore in cylinder inner cylinder；Piston is slidably arranged in plunger shaft, and the intermediate position in piston outer periphery face is inwardly recessed to form a concave portion, and forms relief chamber between recessed portion and the inner wall of plunger shaft；And piston rod, the present invention keeps gas source to push piston to move forward in rodless cavity with constant pressure in injection, thrust is provided for injecting liquid drug, after medical fluid passes through human epidermal with high pressure, piston is just moved to intercommunicating pore and is connected to relief chamber, and the gas of gas source reaches rod chamber after relief chamber and runner from intercommunicating pore simultaneously at this time, generates deboost to piston, so that medical fluid is entered tissue with low-pressure, reduces feeling of pain when injection.
Description
Technical field
The present invention relates to needleless injector technical field, especially a kind of double pressure needleless injectors.
Background technique
Needleless injector belongs to the medical appliance that drug injection is carried out to human body, is widely used in the injection of insulin,
Principle is so that medical fluid is formed thinner liquid flow, moment using high-pressure jet principle by syringe needle when carrying out drug injection
Skin is penetrated to reach subcutaneously；In actual injection process, it is larger that high pressure liquid stream penetrates pressure required when human epidermal, penetrates
Required pressure is smaller when subcutaneous tissue, and at present pressure of the needleless injector when generating high-pressure jet be it is constant, this is just
Cause the high-pressure jet of constant pressure that can generate feeling of pain when reaching subcutaneous tissue after penetrating epidermis, feeling of pain and syringe needle are pierced into
Feeling differ endlessly.
Summary of the invention
The technical problem to be solved by the present invention is generating high-pressure jet to solve needleless injector in the prior art
When pressure be it is constant, cause the high-pressure jet of constant pressure after penetrating epidermis reach subcutaneous tissue when can generate feeling of pain
The problem of, a kind of double pressure needleless injectors are now provided.
The technical solution adopted by the present invention to solve the technical problems is: a kind of double pressure needleless injectors, including is used for
Powered medical fluid is provided to form the Power Component of high pressure liquid stream, which includes:
Cylinder inner cylinder, the cylinder inner cylinder is interior to have plunger shaft, and running through in the plunger shaft has intercommunicating pore；
Piston is slidably arranged in plunger shaft, and the intermediate position in the piston outer periphery face is inwardly recessed to form a concave portion, institute
It states and forms relief chamber between recessed portion and the inner wall of plunger shaft；
And plunger shaft is divided into rod chamber and rodless cavity by piston rod, the piston, the rodless cavity and intercommunicating pore are equal
It is connected to gas source, the runner for being connected to relief chamber and rod chamber is opened up in the piston, the head end in the piston outer periphery face will
Intercommunicating pore blocks, after the gas of gas source pushes piston to move forward to intercommunicating pore from rodless cavity to be connected to relief chamber, gas source
Gas enters relief chamber from intercommunicating pore simultaneously, and reaches rod chamber through runner and generate deboost to piston with this.
In this programme in injection molding, the gas of gas source pushes piston to move forward and provides thrust promotion medicine from rodless cavity first
Liquid passes through human epidermal with high pressure, and after medical fluid passes through human epidermal, piston is just moved to intercommunicating pore and is connected to relief chamber,
At this point, the gas of gas source reaches rod chamber after relief chamber and runner from intercommunicating pore simultaneously, deboost is generated to piston, is offset
Gas is to the thrust of piston in the rodless cavity of part, and the thrust for exporting piston rod weakens, to realize that medical fluid is entered with low-pressure
Tissue reduces feeling of pain when injection.
Further, sealing ring is provided between the first section and tail end and the inner wall of plunger shaft in the piston outer periphery face.
Further, there are two the sealing rings at piston outer periphery kept man of a noblewoman end, the intercommunicating pore is located at piston outer periphery kept man of a noblewoman
Between two sealing rings at end, at the beginning, piston is can be improved to the envelope of intercommunicating pore in two sealing rings at piston outer periphery kept man of a noblewoman end
Stifled effect.
Further, cylinder lagging, inner wall and the cylinder inner cylinder of the cylinder lagging are arranged with outside the cylinder inner cylinder
Depressed gas channel is formed between outer wall, the depressed gas channel is connected to intercommunicating pore.
Further, the first section of the cylinder inner cylinder offers rod end chamber, and the piston rod is slidably arranged in piston rod
Intracavitary, the tail end of the cylinder inner cylinder is equipped with plug.
Further, the inlet channel being connected to rodless cavity is offered on the plug.
Further, the sealing ring for contacting for the inner wall with rod end chamber and forming sealing is provided on the piston rod.
The beneficial effects of the present invention are: the double pressure needleless injectors of the present invention keep gas source to exist with constant pressure in injection
Rodless cavity pushes piston to move forward, living after medical fluid passes through human epidermal with high pressure to provide thrust for injecting liquid drug
Plug is just moved to intercommunicating pore and is connected to relief chamber, and the gas of gas source reaches after relief chamber and runner from intercommunicating pore simultaneously at this time
Rod chamber generates deboost to piston, and offsetting gas in the rodless cavity of part enters medical fluid with low-pressure the thrust of piston
Tissue reduces feeling of pain when injection, to realize double pressure injections of medical fluid.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the schematic cross-sectional view of double pressure needleless injectors of the invention；
Fig. 2 is the schematic diagram when intercommunicating pore of double pressure needleless injectors of the invention is connected to relief chamber；
Fig. 3 is the schematic diagram of piston and piston rod in double pressure needleless injectors of the invention.
In figure: 1, cylinder inner cylinder, 1-1, rod chamber, 1-2, rodless cavity, 1-3, intercommunicating pore, 1-4, rod end chamber, 2, piston,
2-1, recessed portion, 2-2, runner, 3, relief chamber, 4, piston rod, 5, sealing ring, 6, cylinder lagging, 7, depressed gas channel, 8, stifled
Head, 8-1, inlet channel.
Specific embodiment
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates basic structure of the invention, therefore it only shows the composition relevant to the invention, direction and referring to (for example,
Upper and lower, left and right, etc.) can be only used for helping the description to the feature in attached drawing.Therefore, it is not adopted in restrictive sense
With following specific embodiments, and claimed theme is only limited by appended claims and its equivalent form
Range.
Embodiment 1
As shown in Figure 1-3, a kind of double pressure needleless injectors, including be used to provide power and push medical fluid to form high pressure liquid
The Power Component of stream, the Power Component include:
Cylinder inner cylinder 1, the cylinder inner cylinder 1 is interior to have plunger shaft, and running through in the plunger shaft has intercommunicating pore 1-3；
Piston 2, is slidably arranged in plunger shaft, and the intermediate position of 2 outer peripheral surface of piston is inwardly recessed to form a concave portion
2-1 forms relief chamber 3 between the recessed portion 2-1 and the inner wall of plunger shaft；
And plunger shaft is divided into rod chamber 1-1 and rodless cavity 1-2, the rodless cavity 1-2 by piston rod 4, the piston 2
And intercommunicating pore 1-3 is connected to gas source, and the runner 2-2 for being connected to relief chamber 3 Yu rod chamber 1-1, institute are opened up in the piston 2
The head end for stating 2 outer peripheral surface of piston blocks intercommunicating pore 1-3, when the gas of gas source pushes piston 2 to move forward to from rodless cavity 1-2
After intercommunicating pore 1-3 is connected to relief chamber 3, the gas of gas source enters relief chamber 3 from intercommunicating pore 1-3 simultaneously, and reaches through runner 2-2
Rod chamber 1-1 generates deboost to piston 2 with this.
Sealing ring 5, the piston are provided between the first section and tail end and the inner wall of plunger shaft of 2 outer peripheral surface of piston
There are two the sealing rings 5 of 2 outer peripheral surface head ends, and the intercommunicating pore 1-3 is located between two sealing rings 5 of 2 outer peripheral surface head end of piston,
At the beginning, piston 2 can be improved to the plugging effect of intercommunicating pore 1-3 in two sealing rings 5 of 2 outer peripheral surface head end of piston.
Be arranged with cylinder lagging 6 outside the cylinder inner cylinder 1, the outer wall of the inner wall of the cylinder lagging 6 and cylinder inner cylinder 1 it
Between form depressed gas channel 7, the depressed gas channel 7 is connected to intercommunicating pore 1-3, and the gas in gas source leads to through depressed gas
Intercommunicating pore 1-3 is reached behind road 7.
The first section of the cylinder inner cylinder 1 offers rod end chamber 1-4, and the piston rod 4 is slidably arranged in rod end chamber 1-4
Interior, the tail end of the cylinder inner cylinder 1 is equipped with plug 8, offers the inlet channel 8- being connected to rodless cavity 1-2 on the plug 8
1, the gas in gas source enters rodless cavity 1-2 after inlet channel 8-1, is provided with and is used for and rod end chamber on the piston rod 4
The inner wall of 1-4 contacts the sealing ring 5 to form sealing, to improve the sealing effect to rod chamber 1-1.
The working principle of above-mentioned double pressure needleless injectors is as follows:
When needing to be molded, the gas of gas source pushes piston 2 to move forward from rodless cavity 1-2 first, thus by piston rod 4
It pushes injection putter to move ahead, the medical fluid in injection canal is pushed away from micropore, form high pressure liquid stream and injected, work as height
After hydraulic fluid stream passes through human epidermal, piston 2 is just moved to intercommunicating pore 1-3 and is connected to relief chamber 3, at this point, the gas of gas source is same
When from intercommunicating pore 1-3 rod chamber 1-1 is reached after relief chamber 3 and runner 2-2, deboost is generated to piston 2, offsets part nothing
Gas is to the thrust of piston 2 in rod cavity 1-2, and the thrust for exporting piston rod 4 weakens, so that reducing the pressure of high pressure liquid stream makes it
Enter tissue with lower pressure, and then improve the experience of Needleless injection, reduce feeling of pain, because of pain when eliminating children injection
The fear to injecting liquid drug generated bitterly.
Above-mentioned desirable embodiment according to the present invention is enlightenment, and through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention'.This invention it is technical
Range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (7)
1. a kind of double pressure needleless injectors, including being used to provide power the Power Component for pushing medical fluid to form high pressure liquid stream,
It is characterized by: the Power Component includes:
Cylinder inner cylinder (1), the cylinder inner cylinder (1) is interior to have plunger shaft, and running through in the plunger shaft has intercommunicating pore (1-3)；
Piston (2), is slidably arranged in plunger shaft, and the intermediate position of piston (2) outer peripheral surface is inwardly recessed to form a concave portion
(2-1) forms relief chamber (3) between the recessed portion (2-1) and the inner wall of plunger shaft；
And plunger shaft is divided into rod chamber (1-1) and rodless cavity (1-2), the no bar by piston rod (4), the piston (2)
Chamber (1-2) and intercommunicating pore (1-3) are connected to gas source, are opened up in the piston (2) for being connected to relief chamber (3) and rod chamber
The runner (2-2) of (1-1), the head end of piston (2) outer peripheral surface block intercommunicating pore (1-3), when the gas of gas source is from no bar
Chamber (1-2) pushes piston (2) to move forward to after intercommunicating pore (1-3) is connected to relief chamber (3), the gas of gas source while from connection
Hole (1-3) enters relief chamber (3), and reaches rod chamber (1-1) through runner (2-2) and generate deboost to piston (2) with this.
2. double pressure needleless injectors according to claim 1, it is characterised in that: the first section of piston (2) outer peripheral surface
And sealing ring (5) are provided between tail end and the inner wall of plunger shaft.
3. double pressure needleless injectors according to claim 2, it is characterised in that: piston (2) the outer peripheral surface head end
There are two sealing rings (5), and the intercommunicating pore (1-3) is located between two sealing rings (5) of piston (2) outer peripheral surface head end.
4. double pressure needleless injectors according to claim 1, it is characterised in that: be arranged with outside the cylinder inner cylinder (1)
Cylinder lagging (6) forms depressed gas channel (7) between the inner wall of the cylinder lagging (6) and the outer wall of cylinder inner cylinder (1),
The depressed gas channel (7) is connected to intercommunicating pore (1-3).
5. double pressure needleless injectors according to claim 1, it is characterised in that: the first section of the cylinder inner cylinder (1) is opened
Equipped with rod end chamber (1-4), the piston rod (4) is slidably arranged in rod end chamber (1-4), the tail of the cylinder inner cylinder (1)
End is equipped with plug (8).
6. double pressure needleless injectors according to claim 5, it is characterised in that: open up being and not being on the plug (8)
The inlet channel (8-1) of rod cavity (1-2) connection.
7. double pressure needleless injectors according to claim 5, it is characterised in that: be arranged on the piston rod (4) useful
The sealing ring (5) to form sealing is contacted in the inner wall with rod end chamber (1-4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477731.8A CN110124157B (en) | 2019-06-03 | 2019-06-03 | Double pressure needleless injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910477731.8A CN110124157B (en) | 2019-06-03 | 2019-06-03 | Double pressure needleless injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110124157A true CN110124157A (en) | 2019-08-16 |
| CN110124157B CN110124157B (en) | 2024-02-20 |
Family
ID=67579816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910477731.8A Active CN110124157B (en) | 2019-06-03 | 2019-06-03 | Double pressure needleless injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110124157B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984379A (en) * | 2022-05-18 | 2022-09-02 | 浙江工业大学 | High-pressure driven needleless injection device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040035491A1 (en) * | 2002-08-26 | 2004-02-26 | Penjet Corporation | Method and apparatus for needle-less injection with a degassed fluid |
| JP2008086689A (en) * | 2006-10-05 | 2008-04-17 | Shimadzu Corp | Needleless injector |
| CN105498047A (en) * | 2016-01-14 | 2016-04-20 | 江苏丞宇米特医疗科技有限公司 | Low-pressure needle-free injection device |
| CN107252512A (en) * | 2017-06-16 | 2017-10-17 | 南阳市中心医院 | A kind of gas-driven needle-less syringe |
| CN210494791U (en) * | 2019-06-03 | 2020-05-12 | 江苏丞宇米特医疗科技有限公司 | Dual pressure needleless injector |
-
2019
- 2019-06-03 CN CN201910477731.8A patent/CN110124157B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040035491A1 (en) * | 2002-08-26 | 2004-02-26 | Penjet Corporation | Method and apparatus for needle-less injection with a degassed fluid |
| JP2008086689A (en) * | 2006-10-05 | 2008-04-17 | Shimadzu Corp | Needleless injector |
| CN105498047A (en) * | 2016-01-14 | 2016-04-20 | 江苏丞宇米特医疗科技有限公司 | Low-pressure needle-free injection device |
| CN107252512A (en) * | 2017-06-16 | 2017-10-17 | 南阳市中心医院 | A kind of gas-driven needle-less syringe |
| CN210494791U (en) * | 2019-06-03 | 2020-05-12 | 江苏丞宇米特医疗科技有限公司 | Dual pressure needleless injector |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114984379A (en) * | 2022-05-18 | 2022-09-02 | 浙江工业大学 | High-pressure driven needleless injection device |
| CN114984379B (en) * | 2022-05-18 | 2024-02-09 | 浙江工业大学 | High-pressure driven needleless injection device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110124157B (en) | 2024-02-20 |
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