air whistle
... 风量控制仪 air weight controller 空气笛 air whistle 周围空气 air, ambient ...
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膜片式空气气笛 Diaphragm air siren
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.
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