The transfer trolley is mainly applied in assembly line (ring production line, loop production line), metallurgy industry (steel ladle), warehouse transport, ship industry (maintenance, assemble, container transport), workpiece transport in workshop, lathe transport, steel factory (steel billet, steel plate, steel coil, steel pipe, section steel, steel structure), construction(bridge, simple building, concrete, concrete column), petroleum industry (oil pump, sucker rod and parts), energy (polycrystalline silicon, generator, windmill), chemical industry (electrolytic cell, retort etc), railway (rail maintenance, rail welding, train tractor).