... of many years, the plastics single screw extruders of the brand RUN HUAhave formed the The scopes of screw diameter are from 30mm to ... 20,25,28,30,32,35 to 50,52. The extruders are extensivelymade to process the different raw material, such as ... . Among the extruder, the key parts, suchas the barrel,the screw,and the reducer, are designed and manufactured by RUNHUA Co ...