NF C23-504-1-2012
检测和测量停车场和隧道中有毒和可燃气体用电气设备.第1部分:关于检测和测量一氧化碳和氮氧化物的一般性能要求和试验方法
Electrical apparatus for the detection and measurement of toxic and combustible gases in car parks and tunnels - Part 1 : general performance requirements and test methods for the detection and measurement of carbon monoxide and nitrogen oxides.