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0081 - China Speeds Up Technical Transformation. Chen Chaochang (R), assist...Front

China Speeds Up Technical Transformation. Chen Chaochang (R), assistant chief engineer of the engine factory of the Changchun No. 1 Motor Vehicle Plant checking the quality of gears. The cold-rolling mill of gears and the mechanical hand he developed has increased working efficiency by four times. Photo by Yuan Zhaoyi
0081 - China Speeds Up Technical Transformation. Chen Chaochang (R), assist...Front
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Year 1985

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