Beijing Heng man sheng International trade Co., LTD, is a professional production of non-ferrous metal of large companies limited by shares. The company has set up the right market orientation and management idea, good enterprise image and reputation, and has won the general customers approval. Beijing Heng man sheng trade Co., LTD, has passed ISO9001/2000 quality authentication system. After a long hard, forming a professional production of copper, aluminum, zinc ingots ingot, lead pounds Co., ...