DIN EN 50402 E:2015 用于检测和测量可燃或有毒气体或蒸气或氧气的电气设备 固定式气体检测系统功能安全要求 草案
Draft Document - Electrical apparatus for the detection and measurement of combustible or toxic gases or vapours or of oxygen - Requirements on the functional safety of fixed gas detection systems; German version prEN 50402:2015