Operation test of emergency switching-off device for oil pump and ventilator (bilge pump) in engine room.

机舱风、油（舱底泵）应急切断装置操作试验。

youdao

Operation test of emergency switching-off device for oil pump and ventilator (bilge pump) in engine room.

机舱风、油（舱底泵）应急切断装置操作试验。

youdao