| 单词 | rifle |
| 释义 | rifle [`rī·fǝl] DESIGN ENGINEERING A drill core that has spiral grooves on its outside surface. ENGINEERING A borehole that is following a spiral course. ORDNANCE A firearm having spiral grooves upon the surface of its bore to impart rotary motion to a projectile, thereby stabilizing the projectile and ensuring greater accuracy of impact and longer range; it may fire projectiles automatically or semiautomatically, or successive rounds may be manually loaded. |
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