mortice gauge

例句：

1. 1.He used a mortise gauge to mark the spot where he wanted to drill.
   他用一个锯口规标记了他想要钻孔的地方。
2. 2. The carpenter measured the length of the mortise gauge before starting the job.
   木匠在开始工作前测量了锯口规的长度。
3. 3.The engineer used the mortise gauge to ensure that the holes were evenly spaced.
   工程师使用锯口规确保孔洞均匀分布。