Zhangjiakou Zhengtong Petrochemical Metallurgical Machinery Co., Ltd. is a professional supplier of Pump valve accessories & Pressure vessels. With high quality products, excellent service and a good reputation, we have won great support from customers around the world. Thus, our scale has been expanded. We also offer all kinds of OEM/ODM services. At present, we export products to Russia. We have established long-term, stable and good business relationships with many manufacturers and wholesalers around the world. Currently, we are looking forward to even greater cooperation with...