... speed control motors, brake motors, damping motors, torque motors, and DC gear motors. They are widely used in machine tools,textile ... customer. Meanwhile,start to produce DC gear motor;2006 start to produce small series AC gear motor;2007 start to produce planetary gearbox ... terms of small gear motor> in 2010;ZD developed China's first high-precision helical planetary gear reducer in 2011;ZD developed ...