| 单词 | diamond boring machine |
| 释义 | > as lemmasdiamond boring machine diamond boring machine n. = diamond-borer n. ΚΠ 1867 Jrnl. Soc. Arts 15 349 Diamond boring machine. 1875 R. Hunt & F. W. Rudler Ure's Dict. Arts (ed. 7) I. 442 The Diamond Boring Machine..The boring bit is a steel thimble, about 4 inches in length, having two rows of Brazilian black diamonds..in their natural rough state firmly imbedded therein. < as lemmas |
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