CN1069959C - Gas filling method - Google Patents
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- CN1069959C CN1069959C CN98103077A CN98103077A CN1069959C CN 1069959 C CN1069959 C CN 1069959C CN 98103077 A CN98103077 A CN 98103077A CN 98103077 A CN98103077 A CN 98103077A CN 1069959 C CN1069959 C CN 1069959C
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Abstract
The present invention discloses a gas filling method. One pressurized airtight elastomer chamber can be easily formed by generating gas inside the airtight elastomer chamber without injecting pressurized gas from the outside; the pressure is also easy to set; in addition, the gas can be simultaneously fill into a plurality of independent airtight elastomer chambers. The method for generating gas in the airtight chambers of the present invention is characterized in that a heat generating material collocated in the airtight elastomer chamber by high-frequency electromagnetic heating is enabled to generate heat, and a heat decomposing gas generating agent is utilized to generate the gas for filling the inner part of the airtight elastomer chambers.
Description
The present invention is relevant a kind of gas filling method, especially refer in particular to a kind of the need from outside injection pressurization gas, and with the high-frequency electromagnetic heater configuration in the indoor heating material of airtight elastomer, make its heating, utilize this thermolysis gas to produce agent and make it riddle the gas filling method of the inside of airtight elastomer chamber to produce gas.
Traditional gas filling method, usually the export mouth with gas cylinder is connected in the introducing port that is arranged at the confined chamber that needs filling gas, import gas in confined chamber by this introducing port, stop the importing of gas when reaching institute's level pressure power in the confined chamber and seal bolt gas introducing port, this is general process.
Yet in the traditional gas filling method that is as above disclosed, must possess the pipe arrangement that the gas export mouth of gas cylinder is connected usefulness with the introducing port of confined chamber, measure the utensils such as pressure meter that the gas pressure of supplying is used.Traditional gas filling method just because of the above-mentioned all utensils of needs, and is operated these utensils, and seem equipment and operation are all found sth. annoying or trying assorted.
In the occasion that majority confined chamber to be filled is arranged,, just need complicated piping system in order to fill gas simultaneously in most confined chambers.In order to change each confined chamber pressure of the appropriate gas of filling, more shape is miscellaneous to make operation again, and common this operation is difficult.
One of purpose of the present invention is promptly providing a kind of method of being filled by airtight elastomer chamber interior generation gas.In detail, providing a kind of method, it can produce gas and be formed with the confined chamber that gas is enclosed easily in airtight elastomer chamber interior.
Another purpose of the present invention is providing a kind of gas filling method, promptly produces the adjustment of agent use amount according to gas, and fills gas in setting the airtight elastomer chamber that is pressed on desirable force value in the gas filling station easily.And further, the method according to this invention, do not need to inject pressurization gas, and it is indoor in the independently airtight elastomer of a plurality of difference to fill gas simultaneously, also can set in the desirable difference other airtight elastomer chamber of a plurality of branches in addition and press from airtight elastomer outdoor.
In order to reach above-mentioned purpose of the present invention, method of the present invention is to produce composition A at the indoor configuration gas of airtight elastomer, wherein contain (1) gas and produce agent, (2) utilize the excitatory effect in magnetic field, by foucault current and magnetic hysteresis loss and the formed heater of material that can generate heat with itself, with (3) tackiness agent, make the heating of heating material and give above-mentioned heating material with the magnetic field that high frequency oscillator was produced, decomposed and gas is produced agent, produced gas and to fill gas indoor in airtight elastomer in airtight elastomer chamber interior with the heat that it was produced.
Described gas produces agent and decomposes and generation ammonia, nitrogen or carbon dioxide in 50～220 ℃ temperature range.
Described pyrogen is to be selected from a group at least to comprise magnetic substance, a kind of in metal and the carbon.
Described pyrogen shape is to be selected from a group at least to comprise powder, whisker shape, fragment, fiber, weave cotton cloth, nonwovens, a kind of shape in the netted or porous metals plate shape.
Described tackiness agent is to belong to natural or the synthetic polymer material, and it is a solid at room temperature, and can fuse in the temperature under 200 ℃.
Described gas produces in the composition and contains a kind of material, and it can be fallen this gas and produce the decomposition temperature of agent to promote its decomposition.
Utilize this gas filling method provided by the present invention, do not need from outside injection pressurization gas, but produce gas in airtight elastomer chamber interior, and can form pressurized airtight elastomer chamber easily, pressure setting also easy, can fill gas simultaneously in a plurality of airtight elastomer chamber interior independently, so be the method for a kind of novelty, progress and tool practical effect really in addition.
In order further to understand feature of the present invention and content, see also following accompanying drawing and read the detailed description of the specific embodiment of the invention.Yet appended diagram and specific embodiment are only for reference and usefulness explanation, and are not to be used for the present invention is done any restriction, and relevant accompanying drawing is:
Description of drawings:
Fig. 1 is gas filling method one embodiment's of the present invention conceptual illustration figure;
Fig. 2 is another embodiment's of gas filling method of the present invention conceptual illustration figure; And
Fig. 3 is the another embodiment's of gas filling method of the present invention conceptual illustration figure.
The figure number explanation:
1 ... cylinder with large diameter shape recess; 2 ... small diameter cylinders shape recess;
2a ... opening portion; 3 ... small diameter cylinders shape recess;
3a ... opening portion; 4 ... poly-urethane elastomer portion material;
4a ... above; 5 ... the porous aluminium foil;
6 ... the airtight elastomer of major diameter chamber; 7,8 ... the airtight elastomer of minor diameter chamber;
9 ... the agent of sticking work; 10 ... protection rubber section material;
11,13,15 ... the aluminium internal face; 12,14,16 ... mixture;
17 ... major diameter truncated cone recess; 18,19 ... minor diameter truncated cone recess;
20 ... poly-urethane elasticity portion material; 20a ... above;
20b ... below; 21 ... the airtight elastomer of major diameter chamber;
22,23 ... the airtight elastomer of minor diameter chamber; 24,25,26 ... mixture;
27a, 27b ... elastomeric pad; 28,30 ... hemispherical recesses;
29,31 ... polyester portion material; 32 ... spherical airtight elastomer chamber;
33 ... the agent of sticking work; 34 ... wire netting;
35 ... mixture; 36 ... gas produces composition.
Describe the material that employed (1) gas in the embodiment of the invention produces agent, (2) heating material, (3) tackiness agent and forms airtight elastomer chamber below in detail.
Gas used in the present invention produces agent then to be had usually as the inorganic system of stabilizer use and the compound stabilizer of organic system.These compound stabilizers decompose in 50～220 ℃ of scopes of temperature and generation ammonia, nitrogen or carbon dioxide etc. when normal temperature solid shape usually.Preferably select wherein the many and lower compound of decomposition temperature of gas production.
Particularly, carbonate compound such as sodium bicarbonate or ammonium carbonate for example in the inorganic based compound.These inorganic based compounds can use separately, also can and use acidic materials, and for example ammonium salt etc. is regarded decomposition accelerating agent.
Available person hexa (hexamine) for example in the organic system compound, azo based compound (azo compound), nitron compound (nitron compound), sulfuryl hydrazides based compound (sulfonyl hydrazide), C4～dicarboxylic acids based compound (C4～di～carboxylic acidcompound) etc.
As the azo based compound, then for example have C4～dicarboxamide (azo～C4～di～carboxylic amide decomposition temperature: about 200～210 ℃, gas production: 190～210ml/g), azodiisobutyronitrile (the azobisisobutyronitrile decomposition temperature: about 90～102 ℃, gas production: 130～145ml/g) etc.As the nitron based compound, N is then for example arranged, N '～dinitropentamethylenetetramine (N, N '～dinitron penta methelene tetraamine decomposition temperature: about 200～205 ℃, gas production: 232～252ml/g).As sulfuryl hydrazides based compound P～toluene sulfuryl hydrazides (P～toluene sulfonyl hydrazide decomposition temperature: about 103～107 ℃ is for example arranged then, gas production: 108～124ml/g), P, P '～benzene sulfuryl hydrazides (P, P '～benzene sulfonyl hydrazide decomposition temperature: about 155～160 ℃, gas production: 106～116ml/g) etc.Oxalic acid (oxalic acid) etc. is promptly arranged in the C4-dicarboxylic acids based compound.
These gas produce agent and preferably can be decomposed into suitablely usually in the temperature between 50～220 ℃, can and use decomposition accelerating agent when reducing decomposition temperature.As the decomposition accelerating agent person, calcium stearate (calciumstearate) is arranged, zine stearate (zinc stearate), zinc acetate (ainc acetate), sulphur alkanoic acid strontium fatty acid metal salts such as (naphthenicacid strontium); Zinc chloride halogen metal compounds such as (zinc chloride); Metallic oxide; Urea and urea based compound etc.Decomposition accelerating agent can consider that plan produces the decomposition temperature of agent with gas, uses gas to produce the deal below 30% of agent weight.
This gas produce agent and in case of necessity the decomposition accelerating agent of institute and usefulness mix with heating material described later, and this mixture is indoor in airtight elastomer with the state configuration that tackiness agent described later is combined into gas generation composition A.Gas produces agent and should use with pulverulence usually with the heating material.The shape that gas produces composition not Bitsoft adds regulation, and it belongs to block or granularly all can.To stay the back to describe in detail about the shape of heating material, but as using fragment shape, the shape of weaving cotton cloth, during the heating material of nonwovens shape or porous pad sheet, the mixture that gas can be produced agent and tackiness agent is disposed on the heating material of above-mentioned shape, more gas can be produced composition and coat on the heating material.So-called " gas generation composition " also comprises such form.
Above-mentioned gas produces the use amount of agent, is decided by to be filled in the indoor gas amount of airtight elastomer.The gas of high pressure is filled in airtight elastomer when indoor, natural, need to use the gas of volume to produce agent, and when the gas of low-pressure was filled in airtight elastomer chamber, the quantitative change of the institute's gas that uses generation agent was few.More specifically, gas produces the use amount of agent, can consider the airtight elastomer chamber volume and the pressure of this chamber in addition, calculates thus to produce the gas amount that agent produces from gas and decide.＜heating material 〉
Heating material used herein, be in a kind of by the excitatory of magnetic field based on foucault current own and magnetic hysteresis loss and the material that generates heat.Such material body that is magnetic, metal or carbon etc.These materials can use separately or and with two or more.In this so-called magnetic, be meant the compound that in common so-called magnetic field, has magnetizable character, You Te is advisable with the strong magnetism body, and normal magnetic or diamagnetic substance also can.As magnetic is specifically exemplified, various ferrite compounds are arranged then; Iron series compounds such as iron nickel, ferrimanganic, iron cobalt; Manganese sub-group compound; Nickel series compounds; Titanium sub-group compound; The barium based compound; Palladium based compound etc., but be not limited to these.With metal, then can exemplify iron, cobalt, nickel, various stainless steels etc.With carbon, should use the electric medium constant height, the carbon that crystallinity is high is advisable, and for example commercially available electrical carbon and carbon fiber etc. are applicable.
Beyond the above-mentioned substance,, all can be used in method of the present invention as commercially available electric conductivity polysulfide rubber and its subgroup.
The heating material preferably has the shape that can good efficiencies produces foucault current, preferably its be shaped as powder, fragment, fiber, weave cotton cloth, nonwoven fabric, net or porous gasket etc.
The use amount of heating material can produce agent and produce suitable selection in the necessary supply heat of the desirable gas scope decomposing gas, the decomposition temperature of the material of also should considering certainly to generate heat and determining.＜tackiness agent 〉
Adhesive therefor is in order to realize that above-mentioned gas produces agent and uses with the even contact of heating material, so need to give birth to the temperature fusion in the heating of above-mentioned heating material in the method for the invention.Usually use when normal temperature, to be solid, and when 200 ℃ of following temperature the natural or synthetic resin shape material of fusion.Concrete go up to exemplify be copal or petroleum resin such as wax, rosin, reach benzo dihydro croak mutter (croman) resin, ethene (ethylene), vinyl acetate (vinyl acetate) copolymer, the cured synthetic resin such as (polyolefinwax) of polyolefin.The tackiness agent use amount needn't limit especially, can make gas generation agent suitably select to get final product so that be disposed at the indoor weight range of airtight elastomer with heating material even contact.＜elastomer chamber 〉
The material of above-mentioned elastomer chamber needn't limit especially, as long as have the elongation percentage of 200～2000% scopes, and the gas leakage of being filled is got final product.As exemplifying especially, the optimum person is the little thermoplastic elastomer (TPE) of gas breathability (elastomer).Thermoplastic elastomer (TPE) has that vinyl benzene (styrene) is, chlorination alkene (vinylchloride) is, alkene (olefin) is, polyester (polyester) is, polyamide (polyamide) is, or urethane (urethane) is etc., be the shaping rapidoprint that to buy on the market, can arbitrarily select for use according to implementing purpose of the present invention.＜make the method for heating material heating 〉
When implementing gas completion method of the present invention, make to be disposed at the method that the indoor above-mentioned gas of above-mentioned airtight elastomer produces the heating material heating in the composition, so-called high-frequency electromagnetic heating is promptly arranged.Can be divided into dielectrics heating and induction heating two methods in the high-frequency electromagnetic heating.Only two methods can cooperate other conditions such as shape of airtight elastomer chamber all applicable to method of the present invention, give as one thinks fit and one of select for use among both.Induction heating in the methods of the invention, be to be directed in inductor coil on principle with the high frequency current that high frequency oscillator produces, induction field in coil and make the heating material produce foucault current and magnetic hysteresis loss, thereby make the heating of heating material, utilize this heat to produce agent for thermal source decomposes gas.On the other hand, dielectrics heating of the present invention, it is that the high frequency current that high frequency oscillator is produced is shunted in two electrodes on principle, induction field makes tackiness agent and the heating of heating material between two electrodes, is that thermal source decomposes gas generation agent with this heat.Itself heating that causes in the dielectric losses of this occasion tackiness agent and heating material are because of foucault current shown in the induction and the warm that magnetic hysteresis loss produces, and all applying flexibly is to decompose the required heat of gas generation agent.
When implementing method of the present invention, in electromagnetic-induction heating method, its frequency is to select in the scope of 0.1～50MHZ, and in the dielectrics heating means, because the electric wave method limits, adopt 20.3 or 40.6MHZ usually, its output power can be according to the suitable selection of purpose of the inventive method enforcement.
By the joining day of high frequency current that high frequency oscillator sends, that is the heating time of high-frequency induction or dielectric absorption method, very very brief feature is arranged usually, can consider that gas produces the decomposition temperature of agent, select properly, for the several seconds arrives in tens of seconds the scope.The filling method of＜gas 〉
The filling method of gas hereinafter is described in detail in detail with reference to accompanying drawing.These accompanying drawings all belong to the used concept map of explanation the invention process form.
The 1st example of gas completion method of the present invention is described now.
As shown in Figure 1, fill gas in having cylinder with large diameter shape recess 1 and small diameter cylinders shape recess 2, in 3 the poly-urethane elastomer portion material 4 by in above-mentioned cylinder with large diameter shape recess 1 and the airtight elastomer of the porous aluminium foil 5 formed major diameters chamber 6, with by in above-mentioned small diameter cylinders shape recess 2 and the airtight elastomer of the porous aluminium foil 5 formed minor diameters chamber 7, and by in above-mentioned small diameter cylinders shape recess 3 and the airtight elastomer of the porous aluminium foil 5 formed minor diameters chamber 8.Above-mentioned small diameter cylinders shape recess 2,3 and the airtight elastomer of major diameter chamber 6 are airtight elastomer of the present invention chamber in this example, and above-mentioned porous aluminium foil 5 is a heating material of the present invention.
The opening portion 1a of the above-mentioned cylinder with large diameter shape recess 1 on above-mentioned poly-urethane elastomer portion material 4, the opening portion 2a of above-mentioned small diameter cylinders shape recess 2, and the opening portion 3a institute of above-mentioned minor diameter circle footpath shape recess 3 above the opening 4a be coated with the agent 9 of sticking work, engage above-mentioned top 4a and above-mentioned aluminium foil 5 with this sticking work agent 9, on above-mentioned aluminium foil 5, be provided with rubber section material 10.
One one the aluminium internal face 11 that forms the airtight elastomer of above-mentioned major diameter chamber 6 inwalls in above-mentioned aluminium foil 5 has the gas with the hemispherical attached work of state that arches upward to produce agent and the mixed uniformly mixture 12 of tackiness agent.
One one aluminium internal face 13 in the airtight elastomer of the above-mentioned aluminium foil 5 above-mentioned minor diameters of formation chamber 7 inwalls has the gas that engages with the hemispherical state that arches upward to produce agent (azo=isobutyronitrile) and Bond (the sticking outstanding agent of SBR series normal temperature solid) homogeneous mixture 14 again.On the aluminium internal face 15 of the some that forms the airtight elastomer of above-mentioned minor diameter chamber 8 inwalls, there is the gas that engages with the hemispherical state that arches upward to produce agent and the mixed uniformly mixture 16 of tackiness agent again.
(figure does not show with high frequency oscillating apparatus, output 5KW) high frequency current of the frequency 3MHZ that produces imports in the flat inductor coil of scroll type (figure does not show), and in the caused magnetic field of coil, place the airtight elastomer of above-mentioned major diameter chamber 6, the airtight elastomer of above-mentioned minor diameter chamber 7 and 8.The flat action plate that is equipped with inductor coil is close on the above-mentioned elastomer chamber, then circulation during high frequency current in inductor coil, the aluminium foil 5 that is placed in the magnetic field that inductor coil causes produces foucault currents and aluminium foil 5 is generated heat.Passing to the high frequency current time, to have 20 seconds just very sufficient.
Above-mentioned aluminium foil 5 adstante febres, gas in said mixture 12,14 and 16 produce agent to be caused thermolysis and produces nitrogen and be filled in above-mentioned elastomer chamber 6,7 and 8 inside, so form the airtight elastomer chamber with desired pressure.
Because the gas in the said mixture 12,14 and 16 produces dosage, be to consider that gas produces the gas amount that agent produced, press in desirable in above-mentioned elastomer chamber 6,7 and 8 volume and the above-mentioned elastomer chamber 6,7 and 8 and be predetermined its combined amount, be to decompose the time point that finishes to produce agent at gas, each elastomer chamber can remain in fixed interior pressure.
Next illustrates the 2nd example of gas filling method of the present invention.
As shown in Figure 2, having interior shape becomes the major diameter truncated cone recess 17 of contrary truncated cone to become the minor diameter truncated cone recess 18 of truncated cone with interior shape, 19 poly-urethane elastomer portion material 20, this above material 20 with below be that media is engaged in poly-urethane elastomer pad 27a and 27b forms the airtight elastomer of major diameter chamber 21 and the airtight elastomer of minor diameter chamber 22 with sticking work agent 20a and 20b, 23, this elastomer chamber 21, the powder gas that disposes desired quantity in 22 and 23 produces agent (sodium carbonate) and Stainless Steel Fibre through severing, and the gas that is mixed into the key shape together with tackiness agent (paraffin wax) produces composition 24,25 and 26.
This tectosome is inserted in is connected in high frequency oscillating apparatus (figure do not show), between two electrodes of output 3KW (figure does not show).The high frequency current that high frequency oscillating apparatus is produced frequency 20.3MHZ feeds in the electrode, gives above-mentioned gas with the magnetic line of force that causes between electrode and produces composition.Generate heat owing to the magnetic line of force that is produced between electrode makes tackiness agent produce dielectric losses, the heating material also generates heat because of foucault current.The high frequency current currency was about for 30 seconds.The heat that is produced makes gas produce agent 24,25 and 26 decomposition, and elastomer chamber 21,22 and 23 inner filling arbon dioxides form the airtight elastomer chamber with desired pressure.
Besides bright gas filling method of the present invention the 3rd example is in hereinafter.As shown in Figure 4, by polyester portion material 29 with hemispherical recesses 28 and the polyester portion material formed spherical airtight elastomer chambers 31 32 interior gas of filling with hemispherical recesses 30.
Above-mentioned hemispherical recesses 29 is that media engages one another and forms elastomer chamber 32 with 30 with the agent 33 of sticking work.In spherical elastomer chamber 32, on shred shape wire netting 34, be configured among Fig. 1 produce the gas generation composition 36 that agent forms with mixture 35 coatings of bonding material in order to gas.Should place magnetic field in spherical elastomer chamber 32 with quadrat method among Fig. 1, make wire netting 34 heatings and decomposition gas generation agent, filling nitrogen in spherical elastomer chamber 32 forms the airtight elastomer chamber with desired pressure.
Gas filling method of the present invention is not to be pressed into pressurization gas from the outside, but at the inner gas that produces of the formed confined space of elastomer.The supplier of institute is the method for innovating fully.Another feature of the inventive method is to enclose the chamber in the gas that forms confined space from external heat, thus not the reason external heat cause elastomer chamber portion material through thermal metamorphism, so applicable to various materials.For example when manufacturing had the footwear of sole of the elastomer chamber of filling gas with institute level pressure power, it was the most practical to use method of the present invention.
Gas filling method of the present invention has following technical effect.
1. needn't inject pressurization gas from airtight elastomer outdoor, heat so simple gimmick and form independently airtight elastomer chamber at the indoor easy generation gas of airtight elastomer and use high-frequency electromagnetic.2. be disposed at the amount that the indoor gas of airtight elastomer produces agent by adjustment, can estimate the production of gas, thus can be easy to set airtight elastomer chamber in be pressed on desirable force value.3. can be at the indoor gas that produces simultaneously of a plurality of airtight elastomers independently, and can change its volume and pressure respectively arbitrarily to the elastomer chamber in a plurality of airtight elastomers chamber.4. needn't be from external heat in the elastomer chamber, so needn't worry the thermal degradation when that is subjected to of elastomer chamber material, the also unlikely distortion that causes the elastomer chamber.5. can fill gas at short notice at one stroke in elastomer, so the thermal efficiency is high.6. owing to know airtight elastomer chamber volume in advance, gas production and gas that gas produces agent produce the decomposition temperature of agent, so design desirable pressure easily.
As previously discussed, needn't inject pressurization gas can form airtight gas filled elastomer chamber in airtight elastomer chamber method, there is no so example in the past from the outside.Therefore technical meaning of the present invention is obviously high.
In sum, be preferred embodiment of the present invention only, be not to be used for limiting scope of the invention process.Be all equal change and modifications of being done according to the technical solution of the present invention scope, should be all the technical solution of the present invention scope and contain.
Claims (6)
1, a kind of method of in airtight elastic chamber, filling gas, it is characterized in that: wherein included step is:
(A) settle gas to produce composition, wherein contain (1) gas and produce material (agent), (2) pyrogen, it can produce heat energy with magnetic hysteresis loss with the magnetic field eddy current, reaches (3) tackiness agent, encloses in airtight elastomer indoor jointly;
(B) expose this composition to the open air in the formed magnetic field of a high frequency oscillator, produce heat energy to make this pyrogen; Then
(C) decompose this gas and produce agent, in this confined chamber, to produce gas;
(D) result: be full of gas in the confined chamber.
2, gas filling method as claimed in claim 1 is characterized in that: described gas produces agent and decomposes and generation ammonia, nitrogen or carbon dioxide in 50～220 ℃ temperature range.
3, gas filling method as claimed in claim 1 is characterized in that: described pyrogen is to be selected from a group at least to comprise magnetic substance, a kind of in metal and the carbon.
4, gas filling method as claimed in claim 1 is characterized in that: described pyrogen shape is to be selected from a group at least to comprise powder, whisker shape, fragment, fiber, weave cotton cloth, nonwovens, a kind of shape in the netted or porous metals plate shape.
5, gas filling method as claimed in claim 1 is characterized in that: described tackiness agent is to belong to natural or the synthetic polymer material, and it is a solid at room temperature, and can fuse in the temperature under 200 ℃.
6, gas filling method as claimed in claim 1 is characterized in that: described gas produces in the composition and contains a kind of material, and it can be fallen this gas and produce the decomposition temperature of agent to promote its decomposition.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98103077A CN1069959C (en) | 1998-07-27 | 1998-07-27 | Gas filling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98103077A CN1069959C (en) | 1998-07-27 | 1998-07-27 | Gas filling method |
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| CN1069959C true CN1069959C (en) | 2001-08-22 |
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| US9700852B2 (en) | 2012-08-28 | 2017-07-11 | So Spark Ltd. | System, method and capsules for producing sparkling drinks |
| US9382119B2 (en) * | 2014-01-27 | 2016-07-05 | So Spark Ltd. | Rapid high-pressure microwave thermal decomposition system, capsule and method for using same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179117A (en) * | 1995-01-31 | 1998-04-15 | 沃辛顿乙炔钢瓶有限公司 | Calcium silicate mass for storing acetylene gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179117A (en) * | 1995-01-31 | 1998-04-15 | 沃辛顿乙炔钢瓶有限公司 | Calcium silicate mass for storing acetylene gas |
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