单词 | counterbore |
释义 | counterbore1 of 2transitive verb coun·ter·bore ¦kau̇ntə(r)+ : to form a counterbore in : enlarge (part of a hole) by means of a counterbore counterbore 2 of 2noun1 : a flat-bottomed enlargement of the mouth of a cylindrical bore 2 : a drill for making a counterbore compare countersink |
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