internal callipers

例句：

1. 1.The engineer used the internal callipers to measure the diameter of the pipe.
   工程师使用内测尺来测量管道的直径。
2. 2.During the construction phase, the internal callipers were used to ensure the accuracy of the measurements.
   在施工阶段，内测尺被用来确保测量的准确性。
3. 3. The technician was required to use the internal callipers to check the fit of the newparts.
   技术人员被要求使用内测尺检查新部件的配合情况。