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Please change this penetrating piece into watertight construction.
请将这个穿舱件改成水密的。
youdao
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The joints between the sections are also made watertight at this stage of construction.
这时还要对接头进行防水处理。
youdao
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The joints between the sections are also made watertight at this stage of construction.
这时还要对接头进行防水处理。
youdao