... trial assembly crane, 20t gantry crane, Gantry-type NC planer drilling machine, Automatic numerical control, large hot galvanizing line ... production line, Hydraulic NC 3-roll plate bending machine.d)Certificate:Certificate for Qualification of Construction Enteprise, ... trial assembly crane, 20t gantry crane, Gantry-type NC planer drilling machine, Automatic numerical control, large hot galvanizing line ...