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Submerged arc welding process for low-temperature high-toughness niobium micro-alloy steel
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Manufacturing process of spring steel wire rod
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55Si2MnVNbN spring steel and production process thereof
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CN101717894A
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40Si2MnCrNiMoVNbN spring steel and production process thereof
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Roll breakage protecting control method for working roll of heavy and medium plate mill
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Temperature control rolling process of single-rack steckel mill after final rolling
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Rolling process of thick steel plate of single-rack steckel mill
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Gapless rolling process for single-strand steckel mill
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Method for repairing crown brick of large wall of combustion chamber of internal-combustion stove
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Crude gas ignition method of coke oven diffusing tubes and device thereof
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Back washing technology for filtration flushing cinder simultaneously tapped from double tapholes in blast furnace bottom
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