... hard gear surface and thrust block designed for plastic screw extruder. The design of product adapts all kinds of norm specified ... ;6E,7E,8E,9E,10E,12E,15E,JHMTill various, plastic rubber industry is special-purpose speed reducer(May have various mistake ... name , specification number , transmission ratio , assemble a pattern in the machine reducing the speed in the type. Mark gives a demonstration ...