| 单词 | countersink bit |
| 释义 | countersink bit (once / 3939771 pages) n WORD FAMILY countersink bit USAGE EXAMPLESThe valves, C, and their seats, B, bored with a countersink bit, are plainly shown. Popular Mechanics Co., The Boy Mechanic: Volume 1—700 Thin...(2010) n a bit for enlarging the upper part of a hole Syn|Hyper counterbore, countersink 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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