The electrically operated double beam bridge type has the vitality disposition lift hook to be suitable for the machine-finishing,the assembly; The workshop, the metal structure workshop, the metallurgy and the Foundry as well as each kind of warehouse liftthe work, general bridge-type hoist crane design manufacture standard 1, GB 3811-83 hoist crane design standard 2, GB 6067-85 hoisting machinery safety regulation 3, GB/T 14405-1993 general bridge-type hoist crane 4, GB 10183-83 bridge-type and the portal type hoist crane manufacture and the track installation tolerance general bridge-type hoist crane examination