Qingdao Changjie Machinery Co.,Ltd. is one of the most famous modernized manufacture enterprise in China specilizing in manufacturing Plastic Extrusion Machinery, including Plastic tubing production line, plate production line, molding production line etc. The trademark ??Changjie?? has been registered in the National Industry and commerce Administrative bureau official registration and passed GB/T19001-2000idt the ISO9001:2000 quality system authentication. Qingdao Changjie Machinery Co., Ltd. is a enterprise collecting design, production, sales into an organic whole. The company has abundant technical force, complete processing equipment,whose staff up to 50 including 5 designers,4 senior engineer, so the technique of manufacture occupies leading position for same profession. Main pro