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单词 drilling-machine
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drilling-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.
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更新时间:2024/11/10 22:26:33