CN104260737A - Bullet train - Google Patents
Bullet train Download PDFInfo
- Publication number
- CN104260737A CN104260737A CN201410529136.1A CN201410529136A CN104260737A CN 104260737 A CN104260737 A CN 104260737A CN 201410529136 A CN201410529136 A CN 201410529136A CN 104260737 A CN104260737 A CN 104260737A
- Authority
- CN
- China
- Prior art keywords
- introducing port
- export mouth
- train
- car body
- fluid
- 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.)
- Pending
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D17/00—Construction details of vehicle bodies
- B61D17/02—Construction details of vehicle bodies reducing air resistance by modifying contour ; Constructional features for fast vehicles sustaining sudden variations of atmospheric pressure, e.g. when crossing in tunnels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wind Motors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a bullet train which comprises a train body. A plurality of leading-in ports are arranged on the surface of the back portion of the train body. Leading-out ports are arranged on the tail portion of the train body and communicated with the leading-in ports. The bullet train has the advantages that fluid flowing through the surface of the train body through the leading-in ports disposed on the surface of the train body is absorbed and then exhausted from the tail portion of the train body so that the fluid reaching the back portion of the train body simultaneously due to fluid continuity is divided into two parts: one part is exhausted from the leading-out ports on the tail portion to fill in a negative pressure zone, and the other part converges at a position with a certain distance with the back portion of the train after flowing backwards along the surface of the train body to form a negative pressure zone. As the amount of the fluid forming the negative pressure zone on the back portion of the train is reduced, only a thin negative pressure zone can be formed on the back portion of the train, accordingly the large amount of fluid exhausted from the leading-out ports on the tail portion can fill the negative pressure zone on the back portion more easily, negative pressure resistance of the train during driving is reduced, the running speed of the train is improved, and energy consumption is reduced.
Description
Technical field
The present invention relates to train field, particularly relate to a kind of high-speed train.
Background technology
Traditional train travels the resistance produced and comprises: the positive pressure in car body front, side force, the rear portion negative pressure of surrounding, and lift-drag.When now fleetline energy saving optimizing being carried out to the profile of train, usually all pay attention to the front portion to train body, both sides and shape around design to reduce above-mentioned resistance, such as now widely used motor-car headstock is all generally adopt bullet-headed structure, and the vital effect that above-mentioned optimum ideals ignores zone of negative pressure, car rear portion and between bottom and track, the flow of fluid plays minimizing windage with the flow direction, cause running into bottleneck, so be necessary to further improve on the Curve guide impeller reducing windage.
The patent of invention that the part that applicant relates to train fluid continuity has been authorized is: " train ", the patent No. 200810188494.7 " high-speed and energy-saving train " of the patent No. 2009101092527, based on the problems referred to above and above-mentioned mandated program; Forward, lateral fluid drag reduction is made by filling zone of negative pressure, rear portion; Applicant, through lasting research and development for many years, proposes again the scheme of the application further.
Summary of the invention
Technical matters to be solved by this invention is that traditional train is reducing the problem design travelling windage running into bottleneck, whole body is started for wanting cut to lead one by filling zone of negative pressure, rear portion, fluid resistance in train vibration influence is reduced, a kind of train of high-speed and energy-saving is provided.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is: a kind of high-speed train, comprises car body, and be provided with multiple introducing port on the surface at the rear portion of described car body, hull back is provided with export mouth, and described introducing port communicates with export mouth.
The another kind of technical scheme that the present invention adopts is: comprise car body, driving engine, the afterbody of described car body is provided with described driving engine, and the posterior face of car body is provided with introducing port, and the air suctiton inlet of described driving engine communicates with described introducing port.
Beneficial effect of the present invention is: be divided into inside and outside two parts to discharge backward at train rear portion the fluid simultaneously arriving rear vehicle because of fluid continuity: inwardly, the fluid of the equivalent speed of a motor vehicle of a part relatively around vehicle body shell, after top, both sides, the importing of lower guide entrance, ejects from the export mouth of afterbody and fills zone of negative pressure; Outwards, another part relatively leave around car body, be slower than the fluid of the speed of a motor vehicle arrive backward a distance, train rear portion cross formed zone of negative pressure; After divided fluid stream due to formation zone of negative pressure, train rear portion, flow is reduced, flows decrease is so can only form weak zone of negative pressure at train rear portion, known by general knowledge, fluid is close to the approximately equivalent train speed of its speed during train shell, its flow velocity more outside gradually reduces, thus a large amount of comparatively faster fluid making afterbody export mouth discharge more easily fills zone of negative pressure, rear portion, decrease the negative pressure resistance in train vibration influence, thus make forward, lateral fluid drag reduction to improve the moving velocity of train and to reduce energy consumption.
Accompanying drawing explanation
Fig. 1 is the structural representation of the high-speed train of the embodiment of the present invention one.
Fig. 2 is the structural representation of the high-speed train of the embodiment of the present invention two.
Fig. 3 is the structural representation of the high-speed train of the embodiment of the present invention three.
Fig. 4 is the backsight structural representation of the high-speed train of the embodiment of the present invention four.
Fig. 5 is the structural representation of the high-speed train of the embodiment of the present invention five.
Label declaration:
1, car body; 101, vehicle bottom;
2, upper guide entrance; 201, sidepiece introducing port; 202, lower guide entrance; 203, closing panel;
3, afterbody export mouth; 301, passage export mouth;
5, anterior introducing port;
6, deflecting plate;
7, spoiler; 701, fluid passage.
8, fanjet.
Detailed description of the invention
By describing technology contents of the present invention, structural attitude in detail, realized object and effect, accompanying drawing is coordinated to be explained in detail below in conjunction with embodiment.
The design of most critical of the present invention is: between the rear vehicle and afterbody of train region rear body around introducing port is set, and export mouth is set at afterbody thus guides the fluid around car body to fill zone of negative pressure backward, reduce negative pressure resistance, thus fluid resistance is reduced.
Refer to Fig. 1, a kind of high-speed train, comprise car body 1, be provided with multiple introducing port on the surface at the rear portion of described car body 1, the afterbody of car body is provided with export mouth, and described introducing port is communicated with described export mouth.
Introducing port in FIG comprises upper guide entrance 2, sidepiece introducing port 201 and lower guide entrance 202, and export mouth is afterbody export mouth 3.
From foregoing description, beneficial effect of the present invention is: by the introducing port of train body posterior face by near car body surface process, discharge from the afterbody of car body after the fluid suction of the approximately equivalent speed of a motor vehicle, this is just divided into two parts the fluid arriving rear vehicle because of fluid continuity simultaneously at train rear portion: a part ejects from the export mouth of afterbody and fills zone of negative pressure, the flow velocity that another part leaves car body surface is relatively slower than the fluid of the speed of a motor vehicle, pick up speed is carried out admittedly have no chance near housing, arrival a distance, train rear portion crosses and forms zone of negative pressure backward, because the fluid flow of formation zone of negative pressure, train rear portion reduces, flows decrease, so weak zone of negative pressure can only be formed at train rear portion, thus a large amount of very fast fluid making afterbody export mouth discharge more easily fills zone of negative pressure, rear portion, decrease the negative pressure resistance in train vibration influence, thus improve the moving velocity of train and reduce energy consumption.
Further, being communicated with by the interconnecting part of arc between described introducing port with described export mouth, the deflecting plate with double curved surface arcwall face in described interconnecting part, is provided with.
Seen from the above description, deflecting plate can extend the path of fluid process, thus makes the fluid of the equivalent speed of a motor vehicle passed therethrough come further again better to fill zone of negative pressure, accelerates the flow velocity of fluid.Further, described introducing port comprises upper guide entrance, both sides introducing port and lower guide entrance.
Seen from the above description, the export mouth that ring car body is arranged is conducive to fluid and discharges backward from each position thus fill zone of negative pressure better.
Further, as shown in Figure 2, also comprise closing panel 203, head, the afterbody of described car body 1 are respectively equipped with export mouth and introducing port, and closing panel 203 is installed in introducing port and export mouth, and closing panel is used for confined bed entrance and export mouth as required.
Seen from the above description, close all introducing port export mouths of rear vehicle in Fig. 2, afterbody export mouth 3 is introducing port, and upper guide entrance 2, sidepiece introducing port 201 and lower guide entrance 202 are as export mouth, and now train rear portion is anterior backward going.
Further, multiple described introducing port is interconnected to form the annular introducing port around around described car body, and at least one in described upper guide entrance, both sides introducing port, lower guide entrance or annular introducing port communicates with described export mouth.
Further, also comprise spoiler, described spoiler is installed on the bottom of described car body and has certain distance with the bottom of car body, spoiler is for extending the path of fluid process, the surfaces externally and internally of spoiler is machicolated form, spoiler is positioned at the fluid passage that anterior introducing port is communicated with rear channels export mouth, in the export mouth that the described passage export mouth of described fluid passage is arranged on hull back or below export mouth.Particularly, the bottom of car body is provided with closed fluid passage 701, described fluid passage surfaces externally and internally is provided with the spoiler 7 with convex-concave surface, fluid passage is respectively equipped with front channels introducing port and passage export mouth 301 at the front and rear of car body, and described passage export mouth 301 is located at the below of described afterbody export mouth 3.Meanwhile, in described passage export mouth and passage introducing port, be all provided with the centre that the guide plate of arc or passage export mouth are located at afterbody export mouth, or fluid passage 701 and upper guide entrance 2, sidepiece introducing port 201 share an afterbody export mouth 3.
Seen from the above description, fluid passage surfaces externally and internally fluid is greater than vehicle body upper portion path through path, flow velocity is accelerated, can better guide the fluid of process below the car body of train to fill the zone of negative pressure at rear portion further, and lift-drag is disappeared, the setting of guide plate can be accelerated further and guide the discharge direction of fluid.
The present invention also provides a kind of high-speed train, comprises car body, driving engine, and the afterbody of described car body is provided with described driving engine, and the posterior face of car body is provided with introducing port, and the air suctiton inlet of described driving engine communicates with described introducing port.
Further, also comprise spoiler, described spoiler is arranged on the bottom of described car body and forms fluid passage, the surfaces externally and internally of spoiler is that machicolated form is greater than the path from vehicle body upper portion process for making fluid through surfaces externally and internally path, fluid passage, and described fluid passage communicates with the passage export mouth being positioned at rear vehicle with the anterior introducing port being positioned at Vehicular body front.
Further, the air suctiton inlet of described driving engine communicates with at least one in described anterior introducing port and described introducing port, and introducing port is located at top and the both sides at the rear portion of described car body.
Further, described introducing port comprises the annular introducing port that the upper guide entrance at the rear portion being positioned at described car body, both sides introducing port, lower guide entrance and ring car body are arranged, and the air suctiton inlet of described driving engine communicates with at least one in above-mentioned multiple introducing port.
Please refer to Fig. 1, embodiments of the invention one are a kind of high-speed train, and be provided with upper guide entrance 2, sidepiece introducing port 201 and lower guide entrance 202 at the Background Region of car body 1, each introducing port is communicated with afterbody export mouth 3.Particularly, each introducing port is around rear vehicle close to housing, the fluid of the equivalent speed of a motor vehicle imports arc interconnecting part, be located in interconnecting part by the deflecting plate 6 with Double curved arc face, further acceleration ejects a large amount of fluids faster than the speed of a motor vehicle imported and fills zone of negative pressure, rear portion from afterbody export mouth 3, because flow reduces, flows decrease institute forms the zone of negative pressure, rear portion of weakness, thus the drag reduction of the forward that train vibration influence is produced, side direction, train speed is improved.
Please refer to Fig. 2, embodiments of the invention two are a kind of high-speed train, the two ends end to end of the car body 1 of the present embodiment all adopt streamline contour headstock (being commonly called as sub warhead), upper guide entrance 2 is provided with train head is same with upper not being both, sidepiece introducing port 201 and lower guide entrance 202, and afterbody export mouth 3 and closing panel 203 is set, when the anti-every trade of train is sailed, head is as afterbody, afterbody is head, introducing port and the export mouth of rear afterbody is closed by closing panel, so open introducing port and the export mouth of all train front and rear parts, difference is: now the introducing port of train front portion is export mouth, export mouth is introducing port, when train vibration influence, afterbody export mouth 3 and the upper guide entrance 2 at former train rear portion is closed by controlling closing panel 203, sidepiece introducing port 201 and lower guide entrance 202, now train rear portion is anterior, vice versa.
As the improvement to embodiment two, during train vibration influence, fluid enters from anterior introducing port 5, is discharged from upper guide outlet, sidepiece export mouth and lower guide outlet by deflecting plate 6 to surrounding.Hyperbolic arc shape due to deflecting plate 6 can make forward fluid discharge from each export mouth smoothly, so make forward fluid drag reduction.
Please refer to Fig. 3, embodiments of the invention three are a kind of high-speed train, arrange in distance vehicle bottom 101 a distance and form closed fluid passage 701 by the spoiler 7 with convex-concave surface, fluid passage 701 communicates with before and after anterior introducing port 5 and afterbody export mouth 3, the spoiler 7 of arc is all provided with in afterbody export mouth 3 and anterior introducing port 5, the fluid of discharging from fluid passage 701, and from upper guide entrance 2, the fluid that sidepiece introducing port 201 imports, all discharge with the afterbody export mouth 3 of car body, especially the inside and outside path extending fluid process, the flow-disturbing face of fluid passage 701 is greater than the path of train upper flow process, fluid is discharged rear a large amount of fluid faster than the speed of a motor vehicle from export mouth and is better filled zone of negative pressure, rear portion, make the lift-drag in train vibration influence thoroughly eliminate simultaneously.
Please refer to Fig. 3 and Fig. 4, embodiments of the invention four are a kind of high-speed train, are with the difference of above-described embodiment, and the passage export mouth 301 being positioned at the fluid passage 701 of train afterbody is located at the bosom of afterbody export mouth 3.Train under steam, rearward discharge faster than the middle export mouth of the fluid of train flow velocity from afterbody export mouth 3 from fluid passage 701, discharge from the fluid imported from upper guide entrance 2, sidepiece introducing port 201 from afterbody export mouth 3, be centered around around the speed fluid that passage export mouth 301 is discharged faster, now the fluid of surrounding is centered around again around afterbody export mouth 3 displacement fluids, what the fluid layering of three bursts of different in flow rate was orderly is centered around together mutually, is better filled with the zone of negative pressure at car body rear.
In another embodiment to turning in one's mind into structure of embodiment four be: as shown in Figure 3: spoiler 7 is divided into afterbody export mouth 3 and passage to go out to lead mouth 301 afterbody, and wherein afterbody export mouth 3 communicates with upper guide entrance 2, sidepiece introducing port 201; Fluid passage 701 communicates with passage export mouth 301, is located at the below of afterbody export mouth 3 by passage export mouth 301.
In another embodiment, the top of train rear portion casing surroundings, sidepiece, bottom are provided with interconnective bar shaped introducing port, multiple bar shaped introducing port forms the annular introducing port around train surrounding, the more fluid through train rear portion is ejected from afterbody export mouth and fills zone of negative pressure, rear portion.
Please refer to Fig. 5, embodiments of the invention five are a kind of high-speed train, fanjet 8 is provided with in the afterbody export mouth 3 of hull back, the air suctiton inlet of fanjet 8 communicates with upper guide entrance 2, sidepiece introducing port 201, lower guide entrance 202, exhausr port communicates with the external world, the powerful suction that fanjet 8 produces from upper guide entrance 2, sidepiece introducing port 201 and lower guide entrance 202 a large amount of for fluid, suck at high speed, the high-velocity fluid of discharging from afterbody export mouth 3 promotes train and runs at high speed.
In another embodiment to the modified node method of embodiment 5 be, as shown in Figures 3 and 5: in conjunction with the embodiments 4, fanjet 8 is arranged in passage introducing port, and the powerful suction of generation is from anterior introducing port 5 after fluid high-speed suction, and discharge promotion train from export mouth behind fluid passage before, speed travels.
In another embodiment to the modified node method of embodiment 5 be, as shown in Figures 3 and 5: in conjunction with the embodiments 3, fanjet is located in afterbody introducing port, the powerful suction produced fluid from anterior introducing port 5 through fluid passage 701, and the fluid sucked at a high speed from upper guide entrance 2, sidepiece introducing port 201 ejects at a high speed from afterbody export mouth and promotes train fast running.
In another embodiment to the modified node method of embodiment 5 be, as shown in Figures 3 and 5: in front portion, both sides, bottom and above-mentioned annular introducing port, at least one of them air suctiton inlet playing fanjet communicates, but preferably front portion, both sides, bottom or many annular introducing ports communicate with fanjet.Described introducing port and export mouth are provided with decoration figure, and sun gear does not also enter, and plays decoration function again.
As the improvement to embodiment four, removed fluid passage 701, the air suctiton inlet of fanjet 8 communicates with afterbody export mouth 3.
In sum, high-speed train provided by the invention is divided into two parts the fluid arriving rear vehicle because of fluid continuity simultaneously at train rear portion: a part ejects from afterbody export mouth and fills zone of negative pressure, another part arrival a distance, train rear portion crosses and forms zone of negative pressure, because the flow of train rearward portion reduces, so form weak zone of negative pressure at train rear portion, thus a large amount of fluids that afterbody export mouth is discharged more easily fill zone of negative pressure, rear portion.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalents utilizing specification sheets of the present invention and accompanying drawing content to do, or be directly or indirectly used in relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (10)
1. a high-speed train, comprises car body, it is characterized in that, be provided with multiple introducing port on the surface at the rear portion of described car body, hull back is provided with export mouth, and described introducing port communicates with export mouth.
2. high-speed train according to claim 1, is characterized in that, described introducing port is communicated with the interconnecting part by arc between export mouth, is provided with the deflecting plate in Double curved arc face in described interconnecting part.
3. high-speed train according to claim 1, is characterized in that, described introducing port comprises upper guide entrance, both sides introducing port and lower guide entrance.
4. high-speed train according to claim 1, it is characterized in that, also comprise closing panel, the head of described car body, afterbody are respectively equipped with described export mouth and introducing port, described closing panel is installed in introducing port and export mouth, and closing panel is used for confined bed entrance and export mouth as required.
5. high-speed train according to claim 1, it is characterized in that, multiple described introducing port is interconnected to form the annular introducing port around around described car body, and at least one in described upper guide entrance, both sides introducing port, lower guide entrance or annular introducing port communicates with described export mouth.
6. high-speed train according to claim 1, it is characterized in that, also comprise spoiler, described spoiler is installed on the bottom of described car body and has certain distance with the bottom of car body, spoiler is for extending the path of fluid process, the surfaces externally and internally of spoiler is machicolated form, and spoiler is positioned at the fluid passage that anterior introducing port is communicated with rear channels export mouth, in the export mouth that the described passage export mouth of described fluid passage is arranged on hull back or below export mouth.
7. a high-speed train, comprises car body, driving engine, it is characterized in that, the afterbody of described car body is provided with described driving engine, and the posterior face of car body is provided with introducing port, and the air suctiton inlet of described driving engine communicates with described introducing port.
8. high-speed train according to claim 7, it is characterized in that, also comprise spoiler, described spoiler is arranged on the bottom of described car body and forms fluid passage, the surfaces externally and internally of spoiler is that machicolated form is greater than the path from vehicle body upper portion process for making fluid through surfaces externally and internally path, fluid passage, and described fluid passage communicates with the passage export mouth being positioned at rear vehicle with the anterior introducing port being positioned at Vehicular body front.
9. high-speed train according to claim 8, is characterized in that, the air suctiton inlet of described driving engine communicates with at least one in described anterior introducing port and described introducing port, and introducing port is located at top and the both sides at the rear portion of described car body.
10. high-speed train according to claim 8, it is characterized in that, described introducing port comprises the annular introducing port that the upper guide entrance at the rear portion being positioned at described car body, both sides introducing port, lower guide entrance and ring car body are arranged, and the air suctiton inlet of described driving engine communicates with at least one in above-mentioned multiple introducing port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410529136.1A CN104260737A (en) | 2014-10-08 | 2014-10-08 | Bullet train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410529136.1A CN104260737A (en) | 2014-10-08 | 2014-10-08 | Bullet train |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104260737A true CN104260737A (en) | 2015-01-07 |
Family
ID=52152373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410529136.1A Pending CN104260737A (en) | 2014-10-08 | 2014-10-08 | Bullet train |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104260737A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416308A (en) * | 2015-12-10 | 2016-03-23 | 上海洲跃生物科技有限公司 | Device for increasing high speed train adhesive force |
| CN108162995A (en) * | 2017-12-22 | 2018-06-15 | 南京航空航天大学 | A kind of air guide device and the method using its reduction air pressure difference resistance |
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| US20030193216A1 (en) * | 2001-08-23 | 2003-10-16 | Fairburn Douglas S. | Air channeler for reducing wind resistance and method of use |
| CN1636813A (en) * | 2003-12-25 | 2005-07-13 | 株式会社日立制作所 | Railway vehicle and method for operating vehicle |
| CN101767592A (en) * | 2008-12-30 | 2010-07-07 | 朱晓义 | High-speed and energy-saving train |
| CN101973275A (en) * | 2010-09-28 | 2011-02-16 | 朱晓义 | Car or train running system and housing body thereof |
| US20140152050A1 (en) * | 2007-12-27 | 2014-06-05 | Xiaoyi Zhu | Vehicle |
| CN103847751A (en) * | 2014-02-14 | 2014-06-11 | 朱晓义 | High-speed train |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2613682A1 (en) * | 1987-04-10 | 1988-10-14 | Faux Guy | Device making it possible for vehicles to improve their penetration through the air (correction of Cx) |
| US20030193216A1 (en) * | 2001-08-23 | 2003-10-16 | Fairburn Douglas S. | Air channeler for reducing wind resistance and method of use |
| CN1636813A (en) * | 2003-12-25 | 2005-07-13 | 株式会社日立制作所 | Railway vehicle and method for operating vehicle |
| US20140152050A1 (en) * | 2007-12-27 | 2014-06-05 | Xiaoyi Zhu | Vehicle |
| CN101767592A (en) * | 2008-12-30 | 2010-07-07 | 朱晓义 | High-speed and energy-saving train |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416308A (en) * | 2015-12-10 | 2016-03-23 | 上海洲跃生物科技有限公司 | Device for increasing high speed train adhesive force |
| CN108162995A (en) * | 2017-12-22 | 2018-06-15 | 南京航空航天大学 | A kind of air guide device and the method using its reduction air pressure difference resistance |
| CN108162995B (en) * | 2017-12-22 | 2020-03-06 | 南京航空航天大学 | Air guide device and method for reducing air pressure difference resistance by using same |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150107 |
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| RJ01 | Rejection of invention patent application after publication |