hand-drive double beam crane 手动双梁起重机 ; 手动双梁吊车
double-beam crane 双梁吊车
hand-operated single-and-double beam bridge crane 手动单双梁桥式起重机 ; 手动单双梁桥式吊车
Double beam gantry crane 双梁门式起重机
Double beam gantry crane hook 双梁吊钩门式起重机
double beam bridge crane 双梁桥式起重机
Electric double-beam bridge crane 电动双梁桥式起重机
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