BEIJING HENGYIN MACHINERY MANUACTURING CO., LTD Tel:+86(10)58895877/78/79　　E-mail:hengyin@beijing-hengyin.com ADD:No.6 Tai An Road, Shilong Industrial Zone, Men Tou Gou District, Beijing 　　　　　　　(P.C):102308 Sales office: Rm 7A10,ChangYin Building, NO.88 Yongding Road, Haidian District, Beijing 　(P.C):100039