无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項(xiàng)選擇題

The C02 flooding system is actuated by a sequence of steps which are().

A.break glass,pull valve,break glass,pull cylinder control
B.sound evacuation alarm,pull handle
C.open bypass valve,break glass,pull handle
D.open stop valve,open control valve,trip alarm

微信掃碼免費(fèi)搜題