短语词组短语h beam rolling mill h 型钢轧机beam rolling mill 钢梁轧机h -beam mill 型钢轧机;型钢轧机universal h beam mill 万能型钢轧机high reversing beam mill 二辊可逆式钢梁轧机flange beam mill 宽缘钢梁轧机universal beam mill 万能钢梁轧机 返回 beam mill