Sales engineering seamless pipe, alloy pipe, spiral pipe ---- my company specializes in producing thermal expansion pipe, spiral steel pipe, high frequency welded pipe, Baotou Steel, Tianjin Steel and other steel mills annual distribution of the posterior wall of seamless steel tubes, I plant double 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.