transitive. To enlarge (the upper part of a cylindrical hole or cavity) to take the head of a screw. Also absol. Cf. countersink, v. 1.
| 单词 | θ210562 |
| 释义 | society > occupation and work > industry > working with tools or equipment > fastening > fasten [verb (intransitive)] > enlarge hole to receive screw-head (1) counterbore1984 transitive. To enlarge (the upper part of a cylindrical hole or cavity) to take the head of a screw. Also absol. Cf. countersink, v. 1. |
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