Henan Contrust Co.Ltd, China. is one of leading companies in China specializing in producing Planetary gear, planetary gearbox, mixer gearbox,wheel gearbox,coupling etc, locates in Zhengzhou City Henan Province, China,was founded in 1999, covers a land area of 364000 square meters and has more than 200 professional staffs and 10 national level experts. Contrust is one of members of China Technical Committee of Standardization for Gear and one of members of Expert Committee of China Gear Association.