Shipbuilding . head of sounding pipes with self - acting valve . details of body.

造船工业。带自动阀的测深管测头。阀体详图。

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Pipes to be fitted with oil or watertight bronze sounding cap or sounding deck piece where necessary on tops, and the name of the tanks to be marked on.

必要的地方，在管子顶部安装油密或水密青铜测深管头或测深甲板件，同时标注舱室名称。

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