Global Trading Co.Ltd (Dongli)is one of leading manufacturers and suppliers of speed reducer (gearbox) in China, we specialize in worm gear, NRV worm gearbox ( NMRV worm geared motors), Casting iron worm speed reducers, gear operator, parallel shaft helical gear reducers, helical bevel reducers, helical worm gear reducers, tractor gearboxes, auto gearboxes, planetary speed reducer, speed variator, gear motor, electric motors and many other products. OEM inquiries are also welcome