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valve seat wrench /ˈvakjuːm dɪstɪlˈeɪʃən/ n

中文：阀座扳手

中文 · 阀座扳手Español · llave allenFrançais · lève-soupape
Meaning：Elbow-shaped key, usually having one square end and the other octagonal, used mainly for removing faucet seats.
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Plumbing tools

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