主空气瓶(制空气瓶、笛空气瓶)船后气密试验和安全阀的调整。

Air tightness test and safety valve adjusting for main air receiver (control air receiver, air horn receiver) on board.

youdao

主空气瓶(制空气瓶、笛空气瓶)船后气密试验和安全阀的调整。

Air tightness test and safety valve adjusting for main air receiver (control air receiver, air horn receiver) on board.

youdao