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countersink (drill)的英文翻譯是什么意思，詞典釋義與在線(xiàn)翻譯：
英英釋義
名詞 countersink:
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a hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface
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a bit for enlarging the upper part of a hole
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insert (a nail or screw below the surface, as into a countersink)
