| 单词 | drilling-machine |
| 释义 | > as lemmasdrilling-machine drilling-machine n. ΚΠ 1848 Ann. Rep. Commissioner Patents 1847 73 in U.S. Congress. Serial Set (30th Congr., 1st Sess.: House of Representatives Executive Doc. 54) VI Letters patent have been granted for a drilling machine. 1865 G. W. Gesner A. Gesner's Pract. Treat. Coal (ed. 2) ii. 34 Drilling machines which can bore nine feet per hour. < as lemmas |
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