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ring nut /ˈɹɪŋ ˈnʌt/ n

中文：环形螺母

中文 · 环形螺母Español · anilla de la tuercaFrançais · écrou de serrage
Meaning：Part that enables a male union nut to be screwed into a female union nut. nuts
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Found in these illustrated scenes（1）

Pipe union

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