Plastics processing machine operators set up and operate plastic mixing, calendering, extruding and moulding processing machines used in the manufacture of plastic parts and plastic products.
塑料加工机器操作员设置和操作塑炼，压延，挤出，用于制造塑料零件和塑料制品的成型加工机。
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This paper introduces hydraulic vibration-exciting system for marble mouldingmachine, and pats forward rational selection method of vibration. parameter for the system controlled by rotary valve.