| 单词 | piston drill |
| 释义 | > as lemmaspiston drill piston drill n. a percussion drill in which the bit is attached to the rod of a piston. ΘΚΠ society > occupation and work > equipment > piercing or boring tools > [noun] > drill > power drills > percussion drills pneumatic drill1861 percussion drill1871 road drill1907 hammer drill1908 piston drill1910 jackhammer1912 1901 M. M. Kirkman Locomotive Appliances 475 (caption) Piston air drill for drilling, reaming and tapping on locomotive work.] 1910 Nevada State Jrnl. 16 May 2/2 Piston drills are now being used and two shifts employed. 1967 K. McGregor Drilling of Rock i. 12 1860–70..; a commercial piston drill was patented by Burleigh in America. 1997 Morning Call (Allentown, Pa.) (Nexis) 16 Oct. b3 Piston drills... A piston was rigidly attached to the drill steel and moved back and forth in a cylinder on each stroke of the drill. < as lemmas |
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