| 单词 | countersink |
| 释义 | countersink (once / 64587 pages) vn WORD FAMILY countersink: countersinking, countersinks, countersunk USAGE EXAMPLESThat's 11,500 rivet holes drilled off, countersunk and de-burred. BBC(Aug 11, 2014) It is secured to the skull with screws placed in 2 mm countersunk holes. New York Times(Jan 30, 2013) The chocks in which these boats rest are provided with gunmetal wheels, which run in transverse gunmetal tracks, countersunk on the deck. Scientific American(Apr 11, 2012) 1v insert (a nail or screw below the surface, as into a countersink) Syn|Hyper set bury, sink embed deeply 2n 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 Hyper hole an opening deliberately made in or through something 3n a bit for enlarging the upper part of a hole Syn|Hyper counterbore, countersink bit bit the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press |
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