确信每个电门下方的琥珀色的VALVE CLOSED 灯关闭。( )
A.Ensure the brown VALVE CLOSED light below each switch comes on. B.Make sure the amber VALVE CLOSED light below each switch goes off. C.The green VALVE CLOSED light is off.正确答案B
确信每个电门下方的琥珀色的VALVE CLOSED 灯关闭。( )
A.Ensure the brown VALVE CLOSED light below each switch comes on. B.Make sure the amber VALVE CLOSED light below each switch goes off. C.The green VALVE CLOSED light is off.正确答案B
