ZHANGJIAGANG BEIRUI SCIENCE&TECHNOLOGY DEVELOPMENT CO.,LTD. MAINLY PRODUCTS CONICAL TWIN SCREW EXTRUDER ,SINGLE SCREW EXTRUDER ,HIGH-SPEED MIXER ,PVC/HDPE/PP PIPE EXTRUSION LINE ,PVC/WPC PROFILE EXTRUSION LINE ,PLASTIC PELLETIZING AND RECYCLING LINE AND SO ON .THE COMPANY HAS PASSED ISO9001 INTERNATIONAL QUALITY SYSTEM CERTIFICATION , CE CERTIFICATE .