Chengdu zhongke test instrument Co., LTD is southwest a collection scientific research, the production, the sale is a body specialized units. Main production and sales highway, transportation, railway, water conservancy, electric power, architecture, optical and other professional testing and measuring instrument. And wuxi building materials factory building, tianjin, jinan, changchun instrument, gansu, Shanghai, zhejiang, jinhua such experiment depots long-term cooperation. Instrument, wuxi and nanjing soil test instrument factory, SuYiGuang south asphalt, northwestern light, Beijing optics, measurement card, xi lide factories optical instruments.