countersink
英
['kaʊntəˌsɪŋk]
美
['kaʊntəˌsɪŋk]
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v.
张扪孔口;钻孔装埋;打埋头孔
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n.
皿锥;埋头孔;暗钉眼
Noun:
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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
Verb:
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insert (a nail or screw below the surface, as into a countersink)
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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