WORKPLACE ATMOSPHERES. ELECTRICAL APPARATUS USED FOR THE DIRECT DETECTION AND DIRECT CONCENTRATION MEASUREMENT OF TOXIC GASES AND VAPOURS. PART 3: PERFORMANCE REQUIREMENTS FOR APPARATUS USED FOR MEASURING CONCENTRATIONS WELL ABOVE LIMIT VALUES.
工作环境 用于直接检测和直接测量有毒气体和蒸汽浓度的电气设备 第3部分:远高于极限值的浓度测量装置的性能要求