来复线 (lái fù xiàn) — rifling; spiral grooves inside a gun barrel

Definition

Examples

• 枪管内部的来复线能让子弹旋转飞行。
  Qiāng guǎn nèi bù de lái fù xiàn néng ràng zǐ dàn xuán zhuǎn fēi xíng.
  The rifling inside the gun barrel makes bullets spin as they fly.
• 这种步枪的来复线磨损后会影响射击精度。
  Zhè zhǒng bù qiāng de lái fù xiàn mó sǔn hòu huì yǐng xiǎng shè jī jīng dù.
  Wear on the rifling of this rifle affects shooting accuracy.
• 制造来复线需要高精度的拉削工艺。
  Zhì zào lái fù xiàn xū yào gāo jīng dù de lā xiāo gōng yì.
  Manufacturing rifling requires high-precision broaching techniques.