单选题:气体灭火系统巡查主要是针对系统组件外观、现场运行状态、系统检测装置工作状态、安装部位环境条件等的日常巡查。其中要求预制灭

题目内容:
气体灭火系统巡查主要是针对系统组件外观、现场运行状态、系统检测装置工作状态、安装部位环境条件等的日常巡查。其中要求预制灭火系统、柜式气体灭火装置喷嘴前(  )m内不得有阻碍气体释放的障碍物。 A.1
B.2
C.3
D.4

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