CN103539057A - Distribution system for high-danger high-purity chemical liquid - Google Patents
Distribution system for high-danger high-purity chemical liquid Download PDFInfo
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- CN103539057A CN103539057A CN201210245665.XA CN201210245665A CN103539057A CN 103539057 A CN103539057 A CN 103539057A CN 201210245665 A CN201210245665 A CN 201210245665A CN 103539057 A CN103539057 A CN 103539057A
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Abstract
The invention discloses a distribution system for high-danger high-purity chemical liquid. The distribution system for the high-danger high-purity chemical liquid is composed of a storage tank, a metering pump, an unloading cabinet, a distribution cabinet and a PLC control cabinet. An IBC bucket, a double-layer pipeline and a replenishment pump are arranged inside the unloading cabinet. The distribution cabinet comprises a plurality of distributors, and each distributor comprises a liquid extracting pump connected with electric signals of the PLC control cabinet, an electronic control pneumatic valve, a temperature sensor, a pressure sensor, a leakage sensor and the double-layer pipeline. The PLC control cabinet automatically controls the metering pump to convey chemical liquid to the distribution cabinet from the storage tank. The IBC bucket in the unloading cabinet is connected with the storage tank through the double-layer pipeline, and the replenishment pump is started to replenish the storage tank with the chemical liquid when the volume of the chemical liquid inside the storage tank is lower than the preset value. The PLC control cabinet controls the liquid extracting pump and the electronic control pneumatic valve to convey the high-danger chemical liquid in a rationing mode. According to the distribution system for the high-danger high-purity chemical liquid, operating personnel can keep away from the high-danger high-purity chemical liquid, the high-danger high-purity chemical liquid can be conveyed, automatic conveying is achieved, the convenience and the safety of operation are greatly improved, and safety accidents are greatly reduced.
Description
Technical field
The present invention relates to chemical industry environmental protection apparatus field, be specifically related to a kind of high-risk high-purity chemical fluid dispensing system.
Background technology
The high-risk chemical liquid distributing box of current chemical environmental protection industry (epi) application is mostly to distribute by simple manual method, be that worker is with gloves, mouth masks etc. will carry the delivery pipe of high-risk chemical liquid to couple together with hand, one end is positioned in container, one end is positioned in the accumulator tank of high-risk chemical liquid, open the valve of delivery duct, high-risk chemical liquid just flow in container, but because these high-risk chemical liquids have severe corrosive and strong volatilization voltinism mostly, once there is leaking acid in pipeline and joint thereof, bring injury not only can to workman's health, and owing to there is no perfect safety prevention measure, very easily cause safety misadventure and surrounding environment is polluted, severe patient Hui Gei enterprise brings heavy economic losses.
Generation for fear of above-mentioned situation; the employing pump valve plumbing system that the industry also has carries out the conveying of high-risk chemical liquid; but detect and take precautions against still perfect not in the overtemperature of links, superpressure, leakage etc.; what have does not take any countrmeasure even at all; the safety precautions of whole course of conveying and surplus are given warning in advance simultaneously, also slightly inadequate, if once leak certain or do not find in time to lack material; must stop completely, thereby bring inconvenience to production.
Summary of the invention
For solving the problems of the technologies described above, we have proposed a kind of high-risk high-purity chemical fluid dispensing system, by adopting PLC control housing automatically to control described measuring pump, chemical liquids are transported in described distribution cabinet from described storage tank; IBC bucket in described unloading cabinet is connected with described storage tank by described double-skin duct, and starts replenish pump by storage tank described in chemical liquids supply when chemical liquids capacity is lower than predetermined value in described storage tank; Described PLC control housing controls described infusion pump and electropneumatic valve is quantitatively carried high-risk chemical liquid to manufacturing line; Reach the object that high-risk high-purity chemical liquid is carried in automation, greatly improved convenience and the safety of operation.
For achieving the above object, technical scheme of the present invention is as follows:
A high-purity chemical fluid dispensing system, is comprised of storage tank, measuring pump, unloading cabinet, distribution cabinet and PLC control housing;
In described unloading cabinet, be provided with IBC bucket, double-skin duct and replenish pump; Described distribution cabinet is divided into a plurality of distributing boxs, and described distributing box comprises that the infusion pump, electropneumatic valve, temperature sensor, pressure sensor, leak sensor and the double-skin duct that are connected with described PLC control housing electric signal form;
Described PLC control housing is automatically controlled described measuring pump chemical liquids is transported in described distribution cabinet from described storage tank; IBC bucket in described unloading cabinet is connected with described storage tank by described double-skin duct, and starts described replenish pump by storage tank described in chemical liquids supply when chemical liquids capacity is lower than predetermined value in described storage tank;
Described PLC control housing controls described infusion pump and electropneumatic valve is quantitatively carried high-risk chemical liquid to manufacturing line; Described temperature sensor and pressure sensor be the omnidistance temperature and pressure of measuring the high-risk chemical liquid in double-skin duct internal layer respectively, and temperature signal and pressure signal are fed back to described PLC control housing; Whether the omnidistance chemical liquids of measuring in double-skin duct of described leak sensor has leakage in skin, and the waste gas in casing is monitored, and detection signal is fed back to described PLC control housing.
Preferably, described unloading cabinet is divided into two-layer, its upper strata is provided with IBC bucket and double-skin duct, and end face one side in upper strata is provided with the upper orifice of exhaust pipe mouth and double tube, the lower nozzle of described double tube is connected with the IBC bucket in being located at unloading cabinet, described end face opposite side is provided with observation window, and observation window is provided with safety gloves; Described unloading cabinet lower floor is provided with replenish pump and pump box, in described pump box, is provided with drainage pump, and described drainage pump will leak waste liquid and discharge and unload cabinet by leaking gargle pipe; Described gargle pipe is provided with drain valve and position sensor of valve.
Preferably, described unloading is provided with rolling screen door in layer one side cashier's office in a shop, and described rolling screen door side is provided with rolling screen door sensor; Described unloading cashier's office in a shop inner side, layer another side is provided with IBC bucket connecting sensor and IBC bucket position transduser.
Preferably, the unloading cabinet end face side of described rolling screen door top is provided with cleaning spray gun.
Preferably, described unloading cabinet lower floor bottom is provided with pallet, and described pallet is skewed setting, and described pump box is positioned over described pallet least significant end.
Preferably, the gargle pipe in described unloading cabinet lower floor cabinet is provided with drain valve and position sensor of valve, and the gargle pipe outside described unloading cabinet lower floor cabinet is provided with excretion pipelines.
Preferably, described PLC control housing is provided with overtemperature alarm, over pressure alarm device and leakage alarm, and described overtemperature alarm, over pressure alarm device and leakage alarm are connected with described temperature sensor, pressure sensor and leak sensor electric signal by described PLC control housing respectively.
Preferably, be provided with heat sink, dropping equipment, exhaust blower and exhaust damper in described casing, the equal and described PLC control housing of described heat sink, dropping equipment, exhaust blower and exhaust damper is electrically connected to, and is controlled by described PLC control housing follow procedure.
Preferably, described double-skin duct is provided with automatic switching control equipment, and when double-skin duct occurs that warning is sent in leakage, described automatic switching control equipment excises faulty section to wait to keep in repair.
Preferably, described electropneumatic valve is connected with notch indicator, described notch indicator sends indicating positions signal to described PLC control housing, described PLC control housing is according to electropneumatic valve described in indicating positions signal control, and the next procedure of described notch indicator and electropneumatic valve and the control of described PLC control housing is interlocked control.
By technique scheme, the present invention is transported to chemical liquids in described distribution cabinet from described storage tank by adopting PLC control housing automatically to control described measuring pump; IBC bucket in described unloading cabinet is connected with described storage tank by described double-skin duct, and starts replenish pump by storage tank described in chemical liquids supply when chemical liquids capacity is lower than predetermined value in described storage tank; Described PLC control housing controls described infusion pump and electropneumatic valve is quantitatively carried high-risk chemical liquid to manufacturing line; Make operating personal can complete it is carried away from high-risk high-purity chemical liquid, realized automation conveying, greatly improved convenience and the safety of operation, having had significantly of safety misadventure reduced.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the birds-eye view schematic diagram of the disclosed a kind of high-risk high-purity chemical fluid dispensing system of the embodiment of the present invention;
Fig. 2 is that the master of the disclosed a kind of high-risk high-purity chemical fluid dispensing system unloading cabinet of the embodiment of the present invention looks generalized section;
Fig. 3 is the disclosed a kind of high-risk high-purity chemical fluid dispensing system perspective view of the embodiment of the present invention;
Fig. 4 is that the back of the body of the disclosed a kind of high-risk high-purity chemical fluid dispensing system unloading cabinet of the embodiment of the present invention is looked cross-sectional view.Numeral and the represented corresponding component title of letter in figure:
1 tank,,,, 2. Metering pumps,,,, 3. Unloading cabinets,,,, 31.IBC barrels,,,, 32. Supply pump 33 exhaust nozzle,,,, 34. Pipe mouth,,,, 35. observation window,,,, 36. safety gloves,,,, 37. pump box,,,, 38. supply pump,,,, 39. drain valve,,,, 310. valve position sensor ,,,, 311. shutter doors,,,, 312. shutter door sensor,,,, 313.IBC barrel barrel position sensor connected to sensor 314.IBC,,,, 315. cleaning gun,,,, 316. tray,,,, 317. drain valve,,,, 318. valve position sensor,,,, 319. excretory duct probing,,,, 4. distribution cabinets 5.PLC control cabinet,,,, 51. over-temperature alarm,,,, 52 . overpressure alarm,,,, 53. leak alarm,,,, 54. liquid level alarm,,,, 6. distributor,,,, 61. pumping pump,,,, 62. electronically controlled pneumatic valves,,,, 63. temperature sensor,,,, 64. pressure sensors,,,, 65. leak sensor,,,, 66. cooling device,,,, 67. pressure relief devices,,,, 68. exhaust fan,,,, 69. exhaust damper,,,, 7 automatic switching device,,,, 8 position indicator,,,, 9 special chemical liquid tanker
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The invention provides a kind of high-risk high-purity chemical fluid dispensing system, its principle of work is by adopting PLC control housing automatically to control described measuring pump, chemical liquids to be transported in described distribution cabinet from described storage tank; IBC bucket in described unloading cabinet is connected with described storage tank by described double-skin duct, and starts replenish pump by storage tank described in chemical liquids supply when chemical liquids capacity is lower than predetermined value in described storage tank; Described PLC control housing controls described infusion pump and electropneumatic valve is quantitatively carried high-risk chemical liquid to manufacturing line; Reach the object that high-risk high-purity chemical liquid is carried in automation, greatly improved convenience and the safety of operation.
Below in conjunction with embodiment and the specific embodiment, the present invention is further detailed explanation.
Embodiment.
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of high-risk high-purity chemical fluid dispensing system, is comprised of two storage tanks 1, measuring pump 2, unloading cabinet 3, distribution cabinet 4 and PLC control housing 5;
In described unloading cabinet 3, be provided with IBC bucket 31, double-skin duct and replenish pump 32; Described distribution cabinet 4 is divided into a plurality of distributing boxs 6, and described distributing box 6 comprises that the infusion pump 61, electropneumatic valve 62, temperature sensor 63, pressure sensor 64, leak sensor 65 and the double-skin duct that are connected with described PLC control housing 5 electric signal form; Described PLC control housing 5 is automatically controlled described measuring pump 2 chemical liquids is transported in described distribution cabinet 4 from described storage tank 1; I BC bucket 31 in described unloading cabinet 3 is connected with described storage tank 1 by double-skin duct, and starts described replenish pump 32 by storage tank 1 described in chemical liquids supply at the interior chemical liquids capacity of described storage tank 1 during lower than predetermined value; Described PLC control housing 5 controls described infusion pump 61 and electropneumatic valve 62 is quantitatively carried high-risk chemical liquid to manufacturing line; Described temperature sensor 63 and pressure sensor 64 be the omnidistance temperature and pressure of measuring the high-risk chemical liquid in internal layer respectively, and temperature signal and pressure signal are fed back to described PLC control housing 5; Whether the omnidistance chemical liquids of measuring in double-skin duct of described leak sensor 65 has leakage in skin, and the waste gas in casing is monitored, and detection signal is fed back to described PLC control housing 5.
Wherein, described unloading cabinet 3 is divided into two-layer, its upper strata is provided with IBC bucket 31 and double-skin duct, and end face one side in upper strata is provided with the upper orifice 34 of exhaust pipe mouth 33 and double tube, the lower nozzle of described double tube is connected with the IBC bucket 31 in being located at unloading cabinet 3, described end face opposite side is provided with observation window 35, and observation window 35 is provided with safety gloves 36; Described unloading cabinet 3 lower floors are provided with replenish pump 32 and pump box 37, in described pump box 37, are provided with drainage pump 38, and described drainage pump 38 arrives storage tank 1 by double-skin duct by chemical liquids supply or distributes in cabinet 4; Described gargle pipe is provided with drain valve 39 and position sensor of valve 310.One side, described unloading cabinet 3 upper strata is provided with rolling screen door 311, and described rolling screen door 311 sides are provided with rolling screen door sensor 312; Described unloading cabinet 3 inner sides, another side, upper strata are provided with IBC bucket connecting sensor 313 and I BC bucket position transduser 314; The end face side of the unloading cabinet 3 of described rolling screen door 311 tops is provided with cleaning spray gun 315; Described unloading cabinet 3 lower floors bottoms are provided with pallet 316, and described pallet 316 is skewed setting, and described pump box 37 is positioned over described pallet 316 least significant ends; Gargle pipe in described unloading cabinet 3 lower floor's cabinets is provided with drain valve 317 and position sensor of valve 318, and the gargle pipe outside described unloading cabinet 3 lower floor's cabinets is provided with excretion pipelines 319; Described PLC control housing 5 is provided with overtemperature alarm 51, over pressure alarm device 52 and leakage alarm 53, and described overtemperature alarm 51, over pressure alarm device 52 and leakage alarm 53 are connected with described temperature sensor 63, pressure sensor 64 and leak sensor 65 electric signal by described PLC control housing 5 respectively; In described casing, be provided with heat sink 66, dropping equipment 67, exhaust blower 68 and exhaust damper 69, equal and the described PLC control housing 5 of described heat sink 66, dropping equipment 67, exhaust blower 68 and exhaust damper 69 is electrically connected to, and is controlled by described PLC control housing 5 follow procedures; Described double-skin duct is provided with automatic switching control equipment 7, and when double-skin duct occurs that warning is sent in leakage, described automatic switching control equipment 7 excises faulty section to wait to keep in repair; Described electropneumatic valve 62 is connected with notch indicator 8, described notch indicator 8 sends indicating positions signal to described PLC control housing 5, described PLC control housing 5 is according to electropneumatic valve 62 described in indicating positions signal control, and the next procedure of described notch indicator 8 and electropneumatic valve 62 and 5 controls of described PLC control housing is interlocked control.
The normal operation of high-risk high-purity chemical fluid dispensing system of the technical program is sequentially: with measuring pump 2, the high-risk pure chemistry liquid in storage tank 1 is controlled to be fed to by PLC control housing 5 automatically and distribute in cabinet 4, chemical liquid level in storage tank 1 is during lower than certain capacity, level sensor 11 on storage tank 1 feeds back to PLC control housing 5 by the liquid level signal detecting, the corresponding liquid level alarm 54 of controlling of PLC control housing 5 will carry out warning reminding, now start unloading cabinet 3, the chemical liquids that makes to unload in the IBC bucket 31 in cabinet 3 is fed in storage tank 1, contact chemical liquids supplier simultaneously, prepare to carry providing chemical liquid with the special-purpose tank car 9 of chemical liquids.In addition, when producing line chemical liquids supply requirement amount hour, also can and distribute the direct joint supply of cabinet 4 produce by unloading cabinet 3, satisfy the demands, storage tank 1 need not participate in.In order to guarantee the regular supply when product line chemical liquids supply is larger, 1, one conduct of two storage tanks is normally used, and one can be used as standby.
By technique scheme, the present invention is transported to chemical liquids in described distribution cabinet 4 from described storage tank 1 by adopting PLC control housing 5 automatically to control described measuring pump 2; IBC bucket in described unloading cabinet 3 31 is connected with described storage tank 1 by described double-skin duct, and starts replenish pump 32 by storage tank 1 described in chemical liquids supply at the interior chemical liquids capacity of described storage tank 1 during lower than predetermined value; Described PLC control housing 5 controls described infusion pump 61 and electropneumatic valve 62 is quantitatively carried high-risk chemical liquid to manufacturing line; Make operating personal can complete it is carried away from high-risk high-purity chemical liquid, realized automation conveying, greatly improved convenience and the safety of operation, having had significantly of safety misadventure reduced.
Above-described is only a kind of high-risk high-purity chemical fluid dispensing system preferred implementation of the present invention; should be understood that; for the person of ordinary skill of the art; without departing from the concept of the premise of the invention; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (10)
1. a high-risk high-purity chemical fluid dispensing system, is characterized in that, storage tank, measuring pump, unloading cabinet, distribution cabinet and PLC control housing, consists of;
In described unloading cabinet, be provided with IBC bucket, double-skin duct and replenish pump; Described distribution cabinet is divided into a plurality of distributing boxs, and described distributing box comprises that the infusion pump, electropneumatic valve, temperature sensor, pressure sensor, leak sensor and the double-skin duct that are connected with described PLC control housing electric signal form;
Described PLC control housing is automatically controlled described measuring pump chemical liquids is transported in described distribution cabinet from described storage tank; IBC bucket in described unloading cabinet is connected with described storage tank by described double-skin duct, and starts described replenish pump by storage tank described in chemical liquids supply when chemical liquids capacity is lower than predetermined value in described storage tank;
Described PLC control housing controls described infusion pump and electropneumatic valve is quantitatively carried high-risk chemical liquid to manufacturing line; Described temperature sensor and pressure sensor be the omnidistance temperature and pressure of measuring the high-risk chemical liquid in double-skin duct internal layer respectively, and temperature signal and pressure signal are fed back to described PLC control housing; Whether the omnidistance chemical liquids of measuring in double-skin duct of described leak sensor has leakage in skin, and the waste gas in casing is monitored, and detection signal is fed back to described PLC control housing.
2. a kind of high-risk high-purity chemical fluid dispensing system according to claim 1, it is characterized in that, described unloading cabinet is divided into two-layer, its upper strata is provided with IBC bucket and double-skin duct, and end face one side in upper strata is provided with the upper orifice of exhaust pipe mouth and double tube, the lower nozzle of described double tube is connected with the IBC bucket in being located at unloading cabinet, and described end face opposite side is provided with observation window, and observation window is provided with safety gloves; Described unloading cabinet lower floor is provided with replenish pump and pump box, in described pump box, is provided with drainage pump, and described drainage pump will leak waste liquid and discharge and unload cabinet by leaking gargle pipe; Described gargle pipe is provided with drain valve and position sensor of valve.
3. a kind of high-risk high-purity chemical fluid dispensing system according to claim 2, is characterized in that, described unloading is provided with rolling screen door in layer one side cashier's office in a shop, and described rolling screen door side is provided with rolling screen door sensor; Described unloading cashier's office in a shop inner side, layer another side is provided with IBC bucket connecting sensor and IBC bucket position transduser.
4. a kind of high-risk high-purity chemical fluid dispensing system according to claim 3, is characterized in that, the unloading cabinet end face side of described rolling screen door top is provided with cleaning spray gun.
5. a kind of high-risk high-purity chemical fluid dispensing system according to claim 4, is characterized in that, described unloading cabinet lower floor bottom is provided with pallet, and described pallet is skewed setting, and described pump box is positioned over described pallet least significant end.
6. a kind of high-risk high-purity chemical fluid dispensing system according to claim 5, it is characterized in that, gargle pipe in described unloading cabinet lower floor cabinet is provided with drain valve and position sensor of valve, and the gargle pipe outside described unloading cabinet lower floor cabinet is provided with excretion pipelines.
7. a kind of high-risk high-purity chemical fluid dispensing system according to claim 1, it is characterized in that, described PLC control housing is provided with overtemperature alarm, over pressure alarm device and leakage alarm, and described overtemperature alarm, over pressure alarm device and leakage alarm are connected with described temperature sensor, pressure sensor and leak sensor electric signal by described PLC control housing respectively.
8. a kind of high-risk high-purity chemical fluid dispensing system according to claim 7, it is characterized in that, in described casing, be provided with heat sink, dropping equipment, exhaust blower and exhaust damper, equal and the described PLC control housing of described heat sink, dropping equipment, exhaust blower and exhaust damper is electrically connected to, and is controlled by described PLC control housing follow procedure.
9. a kind of high-risk high-purity chemical fluid dispensing system according to claim 8, it is characterized in that, described double-skin duct is provided with automatic switching control equipment, and when double-skin duct occurs that warning is sent in leakage, described automatic switching control equipment excises faulty section to wait to keep in repair.
10. a kind of high-risk high-purity chemical fluid dispensing system according to claim 9, it is characterized in that, described electropneumatic valve is connected with notch indicator, described notch indicator sends indicating positions signal to described PLC control housing, described PLC control housing is according to electropneumatic valve described in indicating positions signal control, and the next procedure of described notch indicator and electropneumatic valve and the control of described PLC control housing is interlocked control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210245665.XA CN103539057B (en) | 2012-07-17 | 2012-07-17 | A kind of Distribution system for high-danger high-purity chemical liquid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210245665.XA CN103539057B (en) | 2012-07-17 | 2012-07-17 | A kind of Distribution system for high-danger high-purity chemical liquid |
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| CN103539057A true CN103539057A (en) | 2014-01-29 |
| CN103539057B CN103539057B (en) | 2016-12-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104192787A (en) * | 2014-08-22 | 2014-12-10 | 贵州茅台酒股份有限公司 | Wine base logistics system |
| CN107860613A (en) * | 2017-10-16 | 2018-03-30 | 湖北三江航天江河化工科技有限公司 | A kind of safe sampler of nitric acid ester adhesive |
| CN112824741A (en) * | 2019-11-21 | 2021-05-21 | 新疆金风科技股份有限公司 | Liquid leakage checking system and liquid leakage checking method |
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| CN102092540A (en) * | 2010-12-08 | 2011-06-15 | 北京七星华创电子股份有限公司 | Chemical liquid storage equipment and chemical liquid storage and distribution control method |
| CN102114399A (en) * | 2009-12-30 | 2011-07-06 | 洪佐松 | Distribution controlling method capable of configuring chemical valve chest |
| CN202129062U (en) * | 2011-05-09 | 2012-02-01 | 洪佐松 | Distribution control device capable of allocating chemical valve boxes |
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2012
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Patent Citations (4)
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| JP2007149075A (en) * | 2005-10-27 | 2007-06-14 | Toray Ind Inc | Point-charge determination method for coarse-graining molecule simulation |
| CN102114399A (en) * | 2009-12-30 | 2011-07-06 | 洪佐松 | Distribution controlling method capable of configuring chemical valve chest |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104192787A (en) * | 2014-08-22 | 2014-12-10 | 贵州茅台酒股份有限公司 | Wine base logistics system |
| CN107860613A (en) * | 2017-10-16 | 2018-03-30 | 湖北三江航天江河化工科技有限公司 | A kind of safe sampler of nitric acid ester adhesive |
| CN112824741A (en) * | 2019-11-21 | 2021-05-21 | 新疆金风科技股份有限公司 | Liquid leakage checking system and liquid leakage checking method |
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| CN103539057B (en) | 2016-12-21 |
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Effective date of registration: 20160824 Address after: 215121, No. 55 West West Road, Suzhou Industrial Park, Jiangsu, China Applicant after: Suzhou is according to this times of environmental protection equipment Science and Technology Ltd. Address before: 215121, Jiangsu, Suzhou Province Industrial Park, only 55 West Road, No. 2 factory building (South) Applicant before: Chang Zheng |
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