... and development of many years, the plastics single screw extruders of the brand RUN HUAhave formed the The scopes ... of screw diameter are from 30mm to 250mm, the L/D ... ratios are from 20,25,28,30,32,35 to 50,52. The ... the extruder, the key parts, suchas the barrel,the screw,and the reducer, are designed and manufactured by RUNHUA Co ...