countersink (drill)
英
美
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名词 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
动词 countersink:
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insert (a nail or screw below the surface, as into a countersink)
以上内容独家创作，受著作权保护，侵权必究
海词词典，十七年品牌
