短語詞組短語crane runway girder 起重機行車大梁crane runaway girder 起重機脫軌護板crane e girder 起重機行車大梁crane main girder 起重機主梁monorail crane -girder 單軌吊車梁crane -girder 吊車梁welded steel crane -girder 焊接鋼吊車梁prestressed concrete crane girder 預(yù)應(yīng)力混凝土吊車梁overhead crane girder 橋式吊車梁 返回 crane girder