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threaded cap /ˈθɜːməl ˈɛnədʒi/ n

中文：螺纹管帽

中文 · 螺纹管帽Español · tapón hembraFrançais · bouchon femelle à visser
Meaning：Plug screwed onto the end of a male threaded pipe to close it off.
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Found in these illustrated scenes（1）

Pipe fittings 2

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