bow-type track gauge

例句：

1. 1. The engineerused a bow-type track gauge to measure the distance between the two points.
   工程师使用一种弓形轨道测量仪来测量两点之间的距离。
2. 2. The new train had a bow-type track gauge that was much more accurate than the old one.
   新火车的弓形轨道测量仪比旧的更精确。
3. 3. The construction crew used a bow-type track gauge to ensure that the tracks were aligned properly.
   施工团队使用弓形轨道测量仪来确保轨道对齐正确。