sea chest cleaning valve的意思|示意

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吹除阀；海底门清除阀

海底门清除阀 ... 水上飞机母船 seaplane carrier 海底门清除阀 sea chest cleaning valve 浮滓吹泄旋塞 scum (or surface) blow off cock ...

吹除阀 ... 通海阀 Sea suction valve 吹除阀 Sea chest cleaning valve 防浪阀 Storm valve ...