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Movable connector of chassis of automobile and heat treatment technology thereof
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Industrial sewing machine oil circuit connecting member and heat treatment process thereof
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Automobile chassis speed reducer outer end cover and thermal processing technology thereof
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Automobile chassis connecting piece and thermal processing technology thereof
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Spindle fixing sleeve of industrial sewing machine and thermal treatment technique of spindle fixing sleeve
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Industrial sewing machine oil circuit connecting member and heat treatment process thereof
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Industrial sewing machine oil-way connecting groove and heat treatment technology thereof
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A friction plate of an automobile chassis and machining process thereof
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Automotive body connecting pin and heat treatment process thereof
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Oilway joint of industrial sewing machine and thermal treatment technique of oilway joint
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Automobile speed reducer cover and thermal processing technology thereof
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