... (mm):any thickness Qingdao Wefsun Metal Material Co., Ltd. located in the beautiful Jiaodong peninsula east to Qingdao city of Shandong province, which was ... Wefsun Metal Material Co., Ltd, Qingdao Sanshan Metal Material Co., Ltd, Qingdao Kaimingyuan International Trading Co., Ltd, Qingdao Wofeiteng Steel Pipe Co., Ltd and Qingdao Woming Steel Pipe Co.,Ltd,were established ...