| 单词 | counterbore |
| 释义 | counterbore (once / 787955 pages) n WORD FAMILY counterbore: counterbores+/bore: bored, borer, bores, boring, counterbore/bored: boredly, boredom/boredom: boredoms/borer: borers/boring: boringly, boringness, borings USAGE EXAMPLESFor enlarging a hole for a certain distance the counterbore is employed. Rose, Joshua, Modern Machine-Shop Practice, Volum...(2012) A counterbore in the arbor hub provides clearance for the hub of the pulley which projects beyond the rim on one side. Jones, Franklin D., Turning and Boring—A specialized t...(2010) If taken off at all it must be pulled, for the dowel-pins, key and counterbore are close fits. Collins, Hubert E. (Hubert Edwin), Steam Turbines—A Book of Instructio...(2010) n a bit for enlarging the upper part of a hole Syn|Hyper countersink, 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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