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Speed-adjustable drilling machine power head and method
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Track for driving drilling machine to lift by adopting double rows of chains and using method thereof
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Deflection mechanism for drilling machine and using method
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Liftable drill rod guide sleeve structure and method
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Heat-resistant sensor support structure and sensor assembly
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Nylon sliding block special for guide rail and fixing method
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Engine tunnel type cylinder body main bearing seat and wear-resistant coating thereof
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Hot spraying engine connecting rod big end inner hole wear-resistant coating
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Thermal spraying engine valve seat ring wear-resistant coating, preparation method and application
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A kind of mold and its production method of the folded casting production bearing cap of Iron Mould Coated Sand line
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A kind of vehicular mute power generator group
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