GCL series trolley introduction:GCL series of geared trolley is driven by pulling the hand chain and travels along the lower edge of I beam. Working in set with chain blocks,Website:http://www.chinachain-hoist.com, it forms a bridge crane, a single beam crane and a cantilever crane.It is widely used in factories, mines, wharfs, warehouses and construction sites for the installation of machinery and equipment, and for lifting and conveying cargoes. Especially it is advantageous for lifting work in the open air without electric power supplyVG series trolley introduction:VG series trolley is a kind of lifting device and it has its own characteristics of simple structure and easy operation. It can be attached to chain hoist of electric hoist or any other loading machinery to form a loading trolley. It can be easily running on the botton flange of I beam track at a curve radius for loading and unloading goods and equipments.