overhead crane girder 桥式吊车梁

Single girder overhead crane 单主梁桥式起重机 ; 单梁桥式起重机 ; 单梁起重机

Overhead crane with simple girder [机] 梁式起重机

overhead d crane girder 桥式吊车梁

overhead traveling crane's girder 行车梁

manual single-girder overhead crane 手动单梁桥式起重机

two-girder overhead travelling crane 双梁式架空移动起重机

overhead cranes with simple girder 单梁式起重机

overhead launching gantry's main girder 造桥机主梁