Shanghai Huiyuan Electro mechanic Development Co., Ltd. is a high-tech enterprise engaging in the research, development and production of vehicle maintenance equipment and tools. With 170 staffs and 6500 m2 of building area, the company has developed and produced labour-saving wrenches used to assembling and disassembling tyres of heavy trucks, gourd-shaped tyre racks of heavy trucks, labour-saving wrenches for small-sized vehicles, electric wrench