Zhejiang Guangming Plastics Machinery Co., Ltd, which is one of the largest enterprises for manafacturing plastic-extruder screw & barrel.and also the largest one which specializes in producing the twin screw & barrel in China.Its technological strength is powerful,and it has heavy finish-machining equipments for producing screw & barrel,NC equipments,nitriding furnaces controlled by computer,and constant-temperature quenching furnaces,as well as advanced monitoring and testing equipments.The ...