短语词组短语aging stainless steel 时效不锈钢Non -Aging Steel 无时效钢;非时效钢martensite aging steel 马氏体时效钢aging high speed steel 时效高速钢non aging steel 非时效钢copper -bearing aging steel 含铜时效钢surface aging high speed steel 表面时效高速钢 返回 aging steel