large arm caliper

例句：

1. 1.He measured the length of the wall with a large arm caliper.
   他用大臂卷尺测量了墙的长度。
2. 2.The carpenter used a large arm caliper to mark the corners of the floor.
   木匠用大臂卷尺来标记地板的角落。
3. 3. The engineer used a large arm caliper to measure the dimensions of the building.
   工程师用大臂卷尺测量建筑物的尺寸。