My company with quality products, reasonable prices, the most sincere service, welcome customers to visit our old Huan --- I company specializing in the production of thermal expansion pipe, spiral steel pipe, high frequency welding tube reasonable annual distribution of Baotou Steel, Tianjin Steel back wall steel seamless pipe, factory 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, the product, precise scale. The public are welcome to visit and negotiate.