短语词组短語h beam rolling mill h 型鋼軋機beam rolling mill 鋼梁軋機h -beam mill 型鋼軋機;型鋼軋機universal h beam mill 萬能型鋼軋機high reversing beam mill 二輥可逆式鋼梁軋機flange beam mill 寬緣鋼梁軋機universal beam mill 萬能鋼梁軋機 返回 beam mill