CN107868537A - A kind of composite fireproof cable crane span structure - Google Patents
A kind of composite fireproof cable crane span structure Download PDFInfo
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- CN107868537A CN107868537A CN201711038613.4A CN201711038613A CN107868537A CN 107868537 A CN107868537 A CN 107868537A CN 201711038613 A CN201711038613 A CN 201711038613A CN 107868537 A CN107868537 A CN 107868537A
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- crane span
- span structure
- composite fireproof
- fireproof cable
- cable crane
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/04—Ingredients characterised by their shape and organic or inorganic ingredients
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/322—Ammonium phosphate
- C08K2003/323—Ammonium polyphosphate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/06—Ethers; Acetals; Ketals; Ortho-esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/315—Compounds containing carbon-to-nitrogen triple bonds
- C08K5/3155—Dicyandiamide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
Abstract
The invention discloses a kind of composite fireproof cable crane span structure, it is related to cable testing bridge technical field.Including cable testing bridge body, the cable testing bridge body surface is coated with fireprotection layer, and the chemical composition and percentage composition of the fireprotection layer are as follows：Acrylate and vinyl acetate emulsion：15 20%, expanded vermiculite：6 12%, APP：0.9 1.5%, bipentaerythrite：1.4 2.1%, dicyandiamide：2.3 2.9%, phosphate:0.6 0.9%, butyl acrylate:1.2 2.3%, vanadic anhydride：2.4 2.6%, montmorillonite：1.3 1.9%, styrene:1.2 2.3%, metering system:1.2 2.3%, glass silk floss:2.1 2.3%, surplus is filler and auxiliary agent.
Description
Technical field
The present invention relates to cable testing bridge technical field, more particularly to a kind of composite fireproof cable crane span structure.
Background technology
Cable testing bridge is electric wire, cable, umbilical laying is reached standardization, systematization, unitized cable laying device,
Its fundamental type includes following several：Channel-type cable bridge, a kind of Totally-enclosed-type cable testing bridge, it is to be best suited for laying to calculate
Electric cable, communication cable, thermocouple cable and other Highly Sensitive Systems control cable shielding interference and heavy corrosion environment in
The protection of cable has preferable effect；Tray type cable bridge, it has, and in light weight, load is big, handsome in appearance, structure is simple
The advantages that single, easy for installation, it is not only suitable for the installation of power cable, is also applied for controlling the laying of cable；Ladder-type cable
Crane span structure, suitable for the laying of the big cable of general diameter, the laying especially suitable for high and low power cable.
Nowadays, cable testing bridge does not possess fire resistance mostly, and when fire occurs, the cable inside cable testing bridge can be made
Into largely destroying, potential safety hazard is easily brought.
The content of the invention
The technical problems to be solved by the invention are when fire occurs, and how to reduce fire to cable testing bridge inside cable
Damage, a kind of the shortcomings that overcoming prior art, there is provided composite fireproof cable crane span structure.
In order to solve the above technical problems, the present invention provides a kind of composite fireproof cable crane span structure, including cable testing bridge body,
The cable testing bridge body surface is coated with fireprotection layer；
The chemical composition and percentage composition of the fireprotection layer are as follows：Acrylate and vinyl acetate emulsion：15-20%, expanded vermiculite：6-12%, gather
Ammonium phosphate：0.9-1.5%, bipentaerythrite：1.4-2.1%, dicyandiamide：2.3-2.9%, phosphate:0.6-0.9%, propylene
Acid butyl ester:1.2-2.3%, vanadic anhydride：2.4-2.6%, montmorillonite：1.3-1.9%, styrene:1.2-2.3%, methyl
Propylene:1.2-2.3%, glass silk floss:2.1-2.3%, surplus are filler and auxiliary agent.
The technical scheme that further limits of the present invention is：
Further, the chemical composition of the fireprotection layer and percentage composition are as follows：Acrylate and vinyl acetate emulsion：18%, expanded vermiculite：9%,
APP：1.2%, bipentaerythrite：1.7%, dicyandiamide：2.6%, phosphate:0.8%, butyl acrylate:1.7%, five
V 2 O：2.5%, montmorillonite:1.6%, styrene:1.7%, metering system:1.7%, glass silk floss:2.2%, surplus is
Filler and auxiliary agent.
A kind of foregoing composite fireproof cable crane span structure, the filler be in fiberfill, kaolin, perlite at least
It is a kind of.
A kind of foregoing composite fireproof cable crane span structure, the auxiliary agent are that ammoniacal liquor, acrylic acid alkali swollen thickener, silane are even
Join at least one of agent.
A kind of foregoing composite fireproof cable crane span structure, the preparation method of the fireprotection layer comprise the following steps：
A, a certain amount of expanded vermiculite, phosphate, vanadic anhydride, montmorillonite, glass silk floss and filler are weighed by formula, mixed
Close, be fully ground with mortar；
B, the mixed-powder in step a is uniformly poured into acrylate and vinyl acetate emulsion, styrene and metering system, vibration mixing, formed mixed
Close liquid；C, APP, bipentaerythrite, dicyandiamide and butyl acrylate are added in mixed solution, utilize mechanical agitation
Device stirs；
D, auxiliary agent is added, stirring at low speed 2 hours, is stirred, by filtering, afterwards barrelling..
A kind of foregoing composite fireproof cable crane span structure, in step a, after being fully ground with mortar, add in ball mill and grind
Twice, whether the fineness of test mixing thing reaches requirement to mill, stops grinding after reaching requirement.
A kind of foregoing composite fireproof cable crane span structure, in step c, mechanical agitator stirs under the conditions of 200r/min
10min, 1.5h is then stirred under the conditions of 800r/min and obtains mixed liquor.
The beneficial effects of the invention are as follows：
(1) for fireprotection layer of the invention using acrylate and vinyl acetate emulsion as film forming matter, dicyandiamide is Intumescent Retardant System, APP and double seasons
Penta tetrol is carburization agent, and when fire occurs, fire lagging expands rapidly, and flame-retardant layer is formed in cable testing bridge casing surroundings,
Protect the cable inside cable testing bridge not to be destroyed, and vanadic anhydride and montmorillonite are added in the present invention, can be with fireprotection layer
Corrosion Protection, in addition, when fire occurs, vanadic anhydride and montmorillonite can form stickum so that formed
Flame-retardant layer and cable testing bridge bulk adhesive ratio it is stronger, so as to the cable in stable protection cable testing bridge.
(2) glass silk floss that adds in the present invention, on the one hand can improve the intensity to form flame-retardant layer, on the other hand can be with
Improve the tolerable temperature of flame-retardant layer, can improve the fire resistance period of flame-retardant layer, after present invention addition glass silk floss, flame-retardant layer it is resistance to
The fiery time can reach 105min, it is possible to additionally incorporate perlite filler while can improve the high temperature resistant degree and flame-retardant layer of flame-retardant layer
Degree of thermal insulation, make cable testing bridge body interior temperature will not be too high, so as to slow down destruction of the high temperature to cable.
Embodiment
Embodiment 1：A kind of composite fireproof cable crane span structure that the present embodiment provides, structure is as shown in figure 1, including cable testing bridge
Body, cable testing bridge body surface are coated with fireprotection layer；
The chemical composition and percentage composition of fireprotection layer are as follows：Acrylate and vinyl acetate emulsion：15%, expanded vermiculite：6%, APP：
0.9%, bipentaerythrite：1.4%, dicyandiamide：2.3%, phosphate:0.6%, butyl acrylate:1.2%, vanadic anhydride：
2.4%, montmorillonite：1.3%, styrene:1.2%, metering system:1.2%, glass silk floss:2.1%, surplus is filler and helped
Agent.
Wherein, filler is at least one of fiberfill, kaolin, perlite, can select perlite, auxiliary agent is ammonia
At least one of water, acrylic acid alkali swollen thickener, silane coupler.
The preparation method of fireprotection layer comprises the following steps：
A, a certain amount of expanded vermiculite, phosphate, vanadic anhydride, montmorillonite, glass silk floss and filler are weighed by formula, mixed
Close, be fully ground with mortar, after being fully ground with mortar, add in ball mill and grind twice, whether the fineness of test mixing thing
Reach requirement, stop grinding after reaching requirement.
B, the mixed-powder in step a is uniformly poured into acrylate and vinyl acetate emulsion, styrene and metering system, vibration mixing, shape
Into mixed liquor；
C, APP, bipentaerythrite, dicyandiamide and butyl acrylate are added in mixed solution, utilize mechanical agitator
Stir, 10min is stirred under the conditions of 200r/min first with mechanical agitator, is then stirred under the conditions of 800r/min
1.5h obtains mixed liquor.
D, auxiliary agent is added, stirring at low speed 2 hours, is stirred, by filtering, afterwards barrelling.
Embodiment 2：A kind of composite fireproof cable crane span structure that the present embodiment provides, structure is as shown in figure 1, including cable testing bridge
Body, cable testing bridge body surface are coated with fireprotection layer；
The chemical composition and percentage composition of fireprotection layer are as follows：Acrylate and vinyl acetate emulsion：18%, expanded vermiculite：9%, APP：
1.2%, bipentaerythrite：1.7%, dicyandiamide：2.6%, phosphate:0.8%, butyl acrylate:1.7%, vanadic anhydride：
2.5%, montmorillonite:1.6%, styrene:1.7%, metering system:1.7%, glass silk floss:2.2%, surplus is filler and helped
Agent.
Wherein, filler is at least one of fiberfill, kaolin, perlite, can select perlite, auxiliary agent is ammonia
At least one of water, acrylic acid alkali swollen thickener, silane coupler.
The preparation method of fireprotection layer comprises the following steps：
A, a certain amount of expanded vermiculite, phosphate, vanadic anhydride, montmorillonite, glass silk floss and filler are weighed by formula, mixed
Close, be fully ground with mortar, after being fully ground with mortar, add in ball mill and grind twice, whether the fineness of test mixing thing
Reach requirement, stop grinding after reaching requirement.
B, the mixed-powder in step a is uniformly poured into acrylate and vinyl acetate emulsion, styrene and metering system, vibration mixing, shape
Into mixed liquor；
C, APP, bipentaerythrite, dicyandiamide and butyl acrylate are added in mixed solution, utilize mechanical agitator
Stir, 10min is stirred under the conditions of 200r/min first with mechanical agitator, is then stirred under the conditions of 800r/min
1.5h obtains mixed liquor.
D, auxiliary agent is added, stirring at low speed 2 hours, is stirred, by filtering, afterwards barrelling.
Embodiment 3：A kind of composite fireproof cable crane span structure that the present embodiment provides, structure is as shown in figure 1, including cable testing bridge
Body, cable testing bridge body surface are coated with fireprotection layer；
The chemical composition and percentage composition of fireprotection layer are as follows：Acrylate and vinyl acetate emulsion：20%, expanded vermiculite：12%, APP：
1.5%, bipentaerythrite：2.1%, dicyandiamide：2.9%, phosphate:0.9%, butyl acrylate:2.3%, vanadic anhydride：
2.6%, montmorillonite：1.9%, styrene:2.3%, metering system:2.3%, glass silk floss:2.3%, surplus is filler and helped
Agent.
Wherein, filler is at least one of fiberfill, kaolin, perlite, can select perlite, auxiliary agent is ammonia
At least one of water, acrylic acid alkali swollen thickener, silane coupler.
The preparation method of fireprotection layer comprises the following steps：
A, a certain amount of expanded vermiculite, phosphate, vanadic anhydride, montmorillonite, glass silk floss and filler are weighed by formula, mixed
Close, be fully ground with mortar, after being fully ground with mortar, add in ball mill and grind twice, whether the fineness of test mixing thing
Reach requirement, stop grinding after reaching requirement.
B, the mixed-powder in step a is uniformly poured into acrylate and vinyl acetate emulsion, styrene and metering system, vibration mixing, shape
Into mixed liquor；
C, APP, bipentaerythrite, dicyandiamide and butyl acrylate are added in mixed solution, utilize mechanical agitator
Stir, 10min is stirred under the conditions of 200r/min first with mechanical agitator, is then stirred under the conditions of 800r/min
1.5h obtains mixed liquor.
D, auxiliary agent is added, stirring at low speed 2 hours, is stirred, by filtering, afterwards barrelling.
Result of the test is as follows：
Comparative example：Comparative example is the fireproof coating of Hebei Kai Hua fire proofing materials Co., Ltd production；
Embodiment 1- embodiments 3 and comparative example are carried out using contrast test, properties are measured according to national standard, examination
Condition and other experiment material all sames are tested, test result is as shown in table 1：
Table 1
It can be obtained by table 1, the expansion multiplying power in embodiment 1-3 is high compared with comparative example, i.e., expansion effect of the invention is preferable, the resistance of formation
Combustion layer can have preferable flame retardant effect, can be obtained by carbonaceous layer morphology observation, expansion height of the invention is relatively low, and carbonaceous layer
It is closeer, it is anticipated that the flame-retardant layer density that the present invention is formed is higher, therefore its flame retardant effect is preferable, and effect of heat insulation is preferable, again
Caking property understands that what the flame-retardant layer that the present invention is formed can relatively be stablized is bonded on cable testing bridge, so as to stable protection cable
Cable in crane span structure, slow down destructiveness of the fire to cable.
In addition to the implementation, the present invention can also have other embodiment.It is all to use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domains of application claims.
Claims (7)
1. a kind of composite fireproof cable crane span structure, including cable testing bridge body, it is characterised in that：The cable testing bridge body surface applies
It is covered with fireprotection layer；
The chemical composition and percentage composition of the fireprotection layer are as follows：Acrylate and vinyl acetate emulsion：15-20%, expanded vermiculite：6-12%, poly- phosphorus
Sour ammonium：0.9-1.5%, bipentaerythrite：1.4-2.1%, dicyandiamide：2.3-2.9%, phosphate:0.6-0.9%, acrylic acid fourth
Ester:1.2-2.3%, vanadic anhydride：2.4-2.6%, montmorillonite：1.3-1.9%, styrene:1.2-2.3%, metering system:1.2-
2.3%, glass silk floss:2.1-2.3%, surplus are filler and auxiliary agent.
A kind of 2. composite fireproof cable crane span structure according to claim 1, it is characterised in that：The chemical composition of the fireprotection layer
And percentage composition is as follows：Acrylate and vinyl acetate emulsion：18%, expanded vermiculite：9%, APP：1.2%, bipentaerythrite：1.7%, double cyanogen
Amine：2.6%, phosphate:0.8%, butyl acrylate:1.7%, vanadic anhydride：2.5%, montmorillonite:1.6%, styrene:1.7%,
Metering system:1.7%, glass silk floss:2.2%, surplus is filler and auxiliary agent.
A kind of 3. composite fireproof cable crane span structure according to claim 1, it is characterised in that：The filler be fiberfill,
At least one of kaolin, perlite.
A kind of 4. composite fireproof cable crane span structure according to claim 1, it is characterised in that：The auxiliary agent is ammoniacal liquor, propylene
At least one of soda acid swollen thickener, silane coupler.
A kind of 5. composite fireproof cable crane span structure according to claim 1, it is characterised in that：The preparation method of the fireprotection layer
Comprise the following steps：
A, a certain amount of expanded vermiculite, phosphate, vanadic anhydride, montmorillonite, glass silk floss and filler are weighed by formula, mixed
Close, be fully ground with mortar；
B, the mixed-powder in step a is uniformly poured into acrylate and vinyl acetate emulsion, styrene and metering system, vibration mixing, formed mixed
Close liquid；
C, APP, bipentaerythrite, dicyandiamide and butyl acrylate are added in mixed solution, utilize mechanical agitator
Stir；
D, auxiliary agent is added, stirring at low speed 2 hours, is stirred, by filtering, afterwards barrelling.
A kind of 6. composite fireproof cable crane span structure according to claim 5, it is characterised in that：In step a, fully ground with mortar
After mill, add in ball mill and grind twice, whether the fineness of test mixing thing reaches requirement, stops grinding after reaching requirement.
A kind of 7. composite fireproof cable crane span structure according to claim 5, it is characterised in that：In step c, mechanical agitator exists
10min is stirred under the conditions of 200r/min, 1.5h is then stirred under the conditions of 800 r/min obtains mixed liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038613.4A CN107868537A (en) | 2017-10-29 | 2017-10-29 | A kind of composite fireproof cable crane span structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711038613.4A CN107868537A (en) | 2017-10-29 | 2017-10-29 | A kind of composite fireproof cable crane span structure |
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| Publication Number | Publication Date |
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| CN107868537A true CN107868537A (en) | 2018-04-03 |
Family
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|---|---|---|---|
| CN201711038613.4A Pending CN107868537A (en) | 2017-10-29 | 2017-10-29 | A kind of composite fireproof cable crane span structure |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109111844A (en) * | 2018-06-05 | 2019-01-01 | 江苏大印电子科技有限公司 | A kind of fule shut-off valve cabinet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911566A (en) * | 2012-10-26 | 2013-02-06 | 清远市普塞呋磷化学有限公司 | Waterproof efficient intumescent fire retardant coating |
| CN107163826A (en) * | 2017-06-30 | 2017-09-15 | 邹亚静 | A kind of nano ceramics polymer anticorrosive paint and preparation method thereof |
-
2017
- 2017-10-29 CN CN201711038613.4A patent/CN107868537A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102911566A (en) * | 2012-10-26 | 2013-02-06 | 清远市普塞呋磷化学有限公司 | Waterproof efficient intumescent fire retardant coating |
| CN107163826A (en) * | 2017-06-30 | 2017-09-15 | 邹亚静 | A kind of nano ceramics polymer anticorrosive paint and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109111844A (en) * | 2018-06-05 | 2019-01-01 | 江苏大印电子科技有限公司 | A kind of fule shut-off valve cabinet |
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Application publication date: 20180403 |