... System certification. We have four patents, a patent for design and one invention patent, become a set of product ... design, development, production, sales for the integration of private enterprises, ... HARDWARE CO., LTDDirect line.:0086-755-89554750Fax: 0086-755-28934695 web: Alibaba web site: Add: No. 19 Shengxing Road, Longgang town, longgang district ...