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tubular structure /ˈtjuːbjʊlə ˈstɹʌktʃə/ n

中文：管状结构

中文 · 管状结构Español · estructura tubularFrançais · structure tubulaire
Meaning：Columnar part of the superstructure that supports the day- and nightmarks and keeps them above the water.
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High focal plane buoy

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