您要查找的是不是：
- 枪管RIFLE线barrel RIFLE
- 在线in-line
- 薄片卷成的枪管laminated barrel
- 四枪管four-gun tube
- 布线wiring
- 周线contour
- 在线的on-line
- 别管no matter (who/what etc.)
- ph.1. 枪管锯短的猎枪sawn-off shotgun
- 零线zero curve
- 只管(adv) no need to think about; by all means
- 这枪能发出看不见的射线。The gun can fire invisible rays.
- 米线rice stick
- 流管flow passage
- 流线streamline
- 圆管circular tube
- 保险管protective tube
- 轮廓线contour line
- 针管needle tube
- 标线gage mark
