Henan Chicheng Electric Co., Ltd is a ISO9001-2000 certified high-tech import and export company and also the government permitted gas detecting device manufacture with Measurement of production License(MC), The explosion-proof certificate(EX) and Fire type certificate(CNAS)approved, we are in in the research and marketing a range of portable and fixed gas detection products, industrial process automation control, safety protection and analytical instrument and we are in Zhengzhou Henan ...