Specializes in sales of various types of thermal expansion steel the (seamless straight seam) Model --- I company specializing in the production of thermal expansion pipe, spiral steel pipe, high frequency welded pipe, the annual distribution of the posterior wall of the Baotou Steel, Tianjin Steel and other steel mills seamless steel pipe I plant sided submerged arc welding process in North China's premier, 35 technicians, thermal expansion pipe equipment unit is a German import unit error is small, accurate scale. The public are welcome to visit and negotiate. Tel: 18331786134