... kinds of gears (spur gear, bevel gear, sprial gear, ring gear, internal gear, sprocket, chain wheel) transmission, gear box, reducer ,shaft and sleeve etc ... all kinds of gears(spur gear,bevel gear,sprial gear,internal gear,sprocket,chain wheel)transmission,reducer,shaft and sleeve etc. They ... good performance of transimission!Manufacture: Dingzhou Jiayu Gear Manufacturing Co.,Ltd. spiroid worm gear