Our company specializes in the production of "Hang-speed" brand worm gears, lifts, NMRV (NRV) gears and other products, with internationally advanced manufacturing and testing equipment. Our business philosophy is "strong, innovative, efficient and realistic". Our company has introduced advanced testing equipment from the United States, Japan, France and other countries and regions, and has passed ISO9001:2008 international quality management system certification. Our main products are ...