家用无线智能燃气表的三防防护 Cordless Intelligent Household Gas Meter of Three Proofing Protection LIU Yu-nan, LI You-neng (Zhengzhou Anran I&C Equipment Co.,Ltd, Zhengzhou 450006, China) : The acceleration of city process makes the higher demand of the gas industry. How to decrease the operation failture rate effectively become the problem to be solved within such industry. The article mainly tell h