渗碳处理20CrMnTiH和20CrNiMoH*齿轮材料滑动摩擦学特性研究
삼탄처리20CrMnTiH화20CrNiMoH*치륜재료활동마찰학특성연구
Research on Sliding Tribological Property of Carburized 20CrMnTiH and 20CrNiMoH Pionion Material
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