CN112091533B - Production method of high-temperature-resistant grate bars - Google Patents

Production method of high-temperature-resistant grate bars Download PDF

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Publication number
CN112091533B
CN112091533B CN202010801617.9A CN202010801617A CN112091533B CN 112091533 B CN112091533 B CN 112091533B CN 202010801617 A CN202010801617 A CN 202010801617A CN 112091533 B CN112091533 B CN 112091533B
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plate
punching
grate bar
blowpipe
transverse
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CN202010801617.9A
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CN112091533A (en
Inventor
黄乐平
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Jiangsu Minwei Electromechanical Co ltd
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Jiangsu Minwei Electromechanical Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/142—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor for the removal of by-products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/36—Removing material
    • B23K26/38—Removing material by boring or cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00—Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70—Auxiliary operations or equipment
    • B23K26/702—Auxiliary equipment
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M173/00—Lubricating compositions containing more than 10% water
    • C10M173/02—Lubricating compositions containing more than 10% water not containing mineral or fatty oils
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
    • C23F11/02—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in air or gases by adding vapour phase inhibitors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • F27B21/02—Sintering grates or tables
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
    • C10M2201/08—Inorganic acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/02—Hydroxy compounds
    • C10M2207/021—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/022—Hydroxy compounds having hydroxy groups bound to acyclic or cycloaliphatic carbon atoms containing at least two hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/12—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms
    • C10M2207/121—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms
    • C10M2207/122—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms having hydrocarbon chains of seven or less carbon atoms monocarboxylic
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
    • C10M2207/10—Carboxylix acids; Neutral salts thereof
    • C10M2207/14—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings
    • C10M2207/144—Carboxylix acids; Neutral salts thereof having carboxyl groups bound to carbon atoms of six-membered aromatic rings containing hydroxy groups
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M2229/00—Organic macromolecular compounds containing atoms of elements not provided for in groups C10M2205/00, C10M2209/00, C10M2213/00, C10M2217/00, C10M2221/00 or C10M2225/00 as ingredients in lubricant compositions
    • C10M2229/04—Siloxanes with specific structure
    • C10M2229/041—Siloxanes with specific structure containing aliphatic substituents

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • General Engineering & Computer Science (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Detergent Compositions (AREA)

Abstract

A production method of a high-temperature-resistant grate bar comprises the following steps of blanking a plate, cutting the plate by adopting a laser cutting machine during blanking, removing slag on the outer surface before cutting, using a transverse blowpipe during slag removal, arranging a plurality of blowholes on the transverse blowpipe, externally connecting a fan on the transverse blowpipe, blowing air to the transverse blowpipe by the fan, cleaning waste residues on the outer surface of the plate during blowing, and putting the cleaned waste residues into a plate collecting box; the grate bar is transferred by means of an automatic manipulator, the grate bar blank is cut by means of laser cutting equipment, the machining process of the grate bar is more efficient, continuous multi-program machining of the grate bar can be achieved, machining time of the grate bar is saved, an anti-oxidation layer can be formed on the grate bar by means of an antioxidant sprayed on the grate bar, and the anti-oxidation performance of the grate bar is further improved.

Description

Production method of high-temperature-resistant grate bars
Technical Field
The invention relates to a manufacturing method of a grate bar, in particular to a production method of a high-temperature-resistant grate bar.
Background
The sintering machine trolley is an important component of the sintering machine, the grate bars are sequentially arranged on the trolley beam or the heat insulation sleeve, and the working environment is severe. The uniformly mixed materials are stacked on the grate bars of the trolley, and hot air passes through the grate bars arranged side by side on the trolley beam in the sintering process, so the structure of the trolley grate bars has great influence on the working efficiency of the sintering machine, the grate bars used under high-temperature work have high requirement on the high-temperature-resistant strength of the grate bars, but the automation degree of the grate bars manufactured in the prior art is lower, and the production of the grate bars cannot be efficiently carried out.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a production method of a high-temperature-resistant grate bar, which can efficiently produce the grate bar.
The invention is realized by adopting the following technical scheme: the production method of the high-temperature resistant grate comprises the following steps
The first step is as follows: blanking the plate, cutting the plate by adopting a laser cutting machine during blanking, removing slag on the outer surface before cutting, using a transverse blowpipe during slag removal, arranging a plurality of blowholes on the transverse blowpipe, externally connecting a fan on the transverse blowpipe, blowing to the transverse blowpipe by the fan, cleaning waste residues on the outer surface of the plate during blowing, and putting the cleaned waste residues into a plate collecting box;
the bottom of the plate collecting box is provided with a parting bead, a heating pipe is arranged in the parting bead, the heating pipe is an infrared heating pipe, the parting bead is arranged at the bottom of the plate collecting box at intervals, the heating pipe positioned in the parting bead is heated by an external power supply, and the heating temperature is controlled to be 5-15 ℃;
the manipulator is arranged on one side of the plate collecting box, the operating panel with the sucker is arranged on the manipulator, and the plate can be placed on the laser cutting machine for cutting from the plate collecting box by virtue of the sucker due to the high-strength sucker arranged on the operating panel;
the method comprises the following steps of cutting a plate, polishing the edge material, using a polishing machine with lubricating liquid when polishing the edge material, arranging a grinding tool bit on the polishing machine, polishing the plate by the grinding tool bit, and conveying the lubricating liquid to the grinding tool bit by a hose when polishing;
the lubricating liquid comprises 5-10kg of glycerol, 5-15kg of emulsion, 1-8kg of glycol, 5-20kg of sodium molybdate, 10-25kg of citric acid, 5-15kg of methyl silicone oil, 10-25kg of ethyl silicone oil, 15-28kg of propionic acid and the balance of active bubble water;
secondly, punching the grid, processing the cut and processed plate into a proper external shape, punching the plate by using punching equipment during processing, using a punching die during punching the plate, wherein the punching die adopts a prismatic hollow die, a plurality of vertical cavities are cast on the die, placing the plate on the punching die, punching the plate by using the punching equipment, and punching the plate to form the grid by punching the plate;
the anti-oxidation coating is required to be sprayed on the outer surface of the grate after the grate is formed by a stamping die in a stamping mode, a spray gun is used when the anti-oxidation coating is sprayed, a spray nozzle is arranged on the spray gun, a liquid distribution disc is arranged between the spray nozzle and the spray gun, a plurality of connection threaded holes are formed in the liquid distribution disc, the spray nozzle is connected with the liquid distribution disc through the connection threaded holes, and the anti-oxidation coating is subjected to liquid distribution through the liquid distribution disc;
spraying an antioxidant liquid when the outer surface of the grate bar is antioxidant, and forming an antioxidant coating when the antioxidant liquid is sprayed on the grate bar; the anti-oxidation liquid is a dicarboxylate-based compound antirust agent, benzotriazole, oil sodium sulfonate, a hard water resisting agent, a non-ionic emulsifier, fatty acid ester, low-viscosity base oil and distilled water, wherein the dicarboxylate-based compound antirust agent is 5-15kg, the benzotriazole is 5-15kg, the oil sodium sulfonate is 5-25kg, the hard water resisting agent is 10-15kg, the non-ionic emulsifier is 15-25kg, the fatty acid ester is 5-10kg, the low-viscosity base oil is 5-15kg, and the balance is distilled water.
Compared with the prior art, the production method of the grid section disclosed by the application has the advantages that the grid section is transported by means of the automatic mechanical arm, grid section blanks are cut by means of the laser cutting equipment, the machining process of the grid section is more efficient, continuous multi-program grid section machining can be achieved, machining time of the grid section is saved, an anti-oxidation layer can be formed on the grid section by means of the antioxidant sprayed on the grid section, and oxidation resistance of the grid section is further improved.
Detailed Description
The present invention is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.
The production method of the high-temperature resistant grate comprises the following steps
The first step is as follows: blanking the plate, cutting the plate by adopting a laser cutting machine during blanking, removing slag on the outer surface before cutting, using a transverse blowpipe during slag removal, arranging a plurality of blowholes on the transverse blowpipe, externally connecting a fan on the transverse blowpipe, blowing to the transverse blowpipe by the fan, cleaning waste residues on the outer surface of the plate during blowing, and putting the cleaned waste residues into a plate collecting box;
the bottom of the plate collecting box is provided with a parting bead, a heating pipe is arranged in the parting bead, the heating pipe is an infrared heating pipe, the parting bead is arranged at the bottom of the plate collecting box at intervals, the heating pipe positioned in the parting bead is heated by an external power supply, and the heating temperature is controlled to be 5-15 ℃;
the manipulator is arranged on one side of the plate collecting box, the operating panel with the sucker is arranged on the manipulator, and the plate can be placed on the laser cutting machine for cutting from the plate collecting box by virtue of the sucker due to the high-strength sucker arranged on the operating panel;
the method comprises the following steps of cutting a plate, polishing the edge material, using a polishing machine with lubricating liquid when polishing the edge material, arranging a grinding tool bit on the polishing machine, polishing the plate by the grinding tool bit, and conveying the lubricating liquid to the grinding tool bit by a hose when polishing;
the lubricating liquid comprises 5-10kg of glycerol, 5-15kg of emulsion, 1-8kg of glycol, 5-20kg of sodium molybdate, 10-25kg of citric acid, 5-15kg of methyl silicone oil, 10-25kg of ethyl silicone oil, 15-28kg of propionic acid and the balance of active bubble water;
secondly, punching the grid, processing the cut and processed plate into a proper external shape, punching the plate by using punching equipment during processing, using a punching die during punching the plate, wherein the punching die adopts a prismatic hollow die, a plurality of vertical cavities are cast on the die, placing the plate on the punching die, punching the plate by using the punching equipment, and punching the plate to form the grid by punching the plate;
the anti-oxidation coating is required to be sprayed on the outer surface of the grate after the grate is formed by a stamping die in a stamping mode, a spray gun is used when the anti-oxidation coating is sprayed, a spray nozzle is arranged on the spray gun, a liquid distribution disc is arranged between the spray nozzle and the spray gun, a plurality of connection threaded holes are formed in the liquid distribution disc, the spray nozzle is connected with the liquid distribution disc through the connection threaded holes, and the anti-oxidation coating is subjected to liquid distribution through the liquid distribution disc;
spraying an antioxidant liquid when the outer surface of the grate bar is antioxidant, and forming an antioxidant coating when the antioxidant liquid is sprayed on the grate bar; the anti-oxidation liquid is a dicarboxylate-based compound antirust agent, benzotriazole, oil sodium sulfonate, a hard water resisting agent, a non-ionic emulsifier, fatty acid ester, low-viscosity base oil and distilled water, wherein the dicarboxylate-based compound antirust agent is 5-15kg, the benzotriazole is 5-15kg, the oil sodium sulfonate is 5-25kg, the hard water resisting agent is 10-15kg, the non-ionic emulsifier is 15-25kg, the fatty acid ester is 5-10kg, the low-viscosity base oil is 5-15kg, and the balance is distilled water.
The grate that has passed through anti-oxidant treatment, need dry the operation, shelve the grate in the greenhouse when drying, be provided with the multiunit mounted frame in the greenhouse, be provided with the loop wheel on the mounted frame, hang the grate on the loop wheel, the grate hangs and carries out the warm braw on the mounted frame and dry, pour into ozone into in to the warm braw pipeline when the warm braw is dried, rely on ozone can let the humidity reduction in the greenhouse, make the grate after the greenhouse is dried oxidation resisting layer of surface more firm.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.

Claims (1)

1. The production method of the high-temperature-resistant grate bar is characterized by comprising the following steps of: comprises the following steps
The first step is as follows: blanking the plate, cutting the plate by adopting a laser cutting machine during blanking, removing slag on the outer surface before cutting, using a transverse blowpipe during slag removal, arranging a plurality of blowholes on the transverse blowpipe, externally connecting a fan on the transverse blowpipe, blowing to the transverse blowpipe by the fan, cleaning waste residues on the outer surface of the plate during blowing, and putting the cleaned waste residues into a plate collecting box;
the bottom of the plate collecting box is provided with a parting bead, a heating pipe is arranged in the parting bead, the heating pipe is an infrared heating pipe, the parting bead is arranged at the bottom of the plate collecting box at intervals, the heating pipe positioned in the parting bead is heated by an external power supply, and the heating temperature is controlled to be 5-15 ℃;
the manipulator is arranged on one side of the plate collecting box, the operating panel with the sucker is arranged on the manipulator, and the plate can be placed on the laser cutting machine for cutting from the plate collecting box by virtue of the sucker due to the high-strength sucker arranged on the operating panel;
the method comprises the following steps of cutting a plate, polishing the edge material, using a polishing machine with lubricating liquid when polishing the edge material, arranging a grinding tool bit on the polishing machine, polishing the plate by the grinding tool bit, and conveying the lubricating liquid to the grinding tool bit by a hose when polishing;
the lubricating liquid comprises 5-10kg of glycerol, 5-15kg of emulsion, 1-8kg of glycol, 5-20kg of sodium molybdate, 10-25kg of citric acid, 5-15kg of methyl silicone oil, 10-25kg of ethyl silicone oil, 15-28kg of propionic acid and the balance of active bubble water;
secondly, punching the grid, processing the cut and processed plate into a proper external shape, punching the plate by using punching equipment during processing, using a punching die during punching the plate, wherein the punching die adopts a prismatic hollow die, a plurality of vertical cavities are cast on the die, placing the plate on the punching die, punching the plate by using the punching equipment, and punching the plate to form the grid by punching the plate;
the anti-oxidation coating is required to be sprayed on the outer surface of the grate after the grate is formed by a stamping die in a stamping mode, a spray gun is used when the anti-oxidation coating is sprayed, a spray nozzle is arranged on the spray gun, a liquid distribution disc is arranged between the spray nozzle and the spray gun, a plurality of connection threaded holes are formed in the liquid distribution disc, the spray nozzle is connected with the liquid distribution disc through the connection threaded holes, and the anti-oxidation coating is subjected to liquid distribution through the liquid distribution disc;
spraying an antioxidant liquid when the outer surface of the grate bar is antioxidant, and forming an antioxidant coating when the antioxidant liquid is sprayed on the grate bar; the anti-oxidation liquid is a dicarboxylate-based compound antirust agent, benzotriazole, oil sodium sulfonate, a hard water resisting agent, a non-ionic emulsifier, fatty acid ester, low-viscosity base oil and distilled water, wherein the dicarboxylate-based compound antirust agent is 5-15kg, the benzotriazole is 5-15kg, the oil sodium sulfonate is 5-25kg, the hard water resisting agent is 10-15kg, the non-ionic emulsifier is 15-25kg, the fatty acid ester is 5-10kg, the low-viscosity base oil is 5-15kg, and the balance is distilled water.
CN202010801617.9A 2020-08-11 2020-08-11 Production method of high-temperature-resistant grate bars Active CN112091533B (en)

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Publication number Priority date Publication date Assignee Title
CN112643225A (en) * 2020-12-28 2021-04-13 江苏荣鼎安防产品制造有限公司 Edge pressing forming process for door leaf of fireproof door without welding points

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EP0089410A3 (en) * 1982-03-24 1985-11-13 Julius Hupfer GmbH & Co. Grating support for a shelving or the like
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CN207629544U (en) * 2017-11-30 2018-07-20 南京梅山冶金发展有限公司 A kind of device of quick disassembly table axle
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089410A3 (en) * 1982-03-24 1985-11-13 Julius Hupfer GmbH & Co. Grating support for a shelving or the like
JPS58179791A (en) * 1982-04-16 1983-10-21 三菱重工業株式会社 Circular grate
CN86210426U (en) * 1986-12-16 1987-10-07 湘潭钢铁厂 Grid for the cart of sintering machine
CN2190271Y (en) * 1994-03-10 1995-02-22 武汉钢铁(集团)公司 Skirt grid bars of sinter
CN1304902A (en) * 2000-02-18 2001-07-25 沈智琪 Technology for producing grate
CN1597588A (en) * 2004-07-22 2005-03-23 兴化市精密铸钢有限公司 Manufacturing method of slit type slot comb plate
CN1995299A (en) * 2006-12-08 2007-07-11 中国石油化工股份有限公司 Cutting liquor composition
CN201390708Y (en) * 2009-02-10 2010-01-27 山东赛博集团有限公司 Grid type cooler
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