同步检定器

例句：

1. 1. The synchronous calibrator was used to measure the distance between two points accurately.
   同步检定器被用来准确地测量两点之间的距离。
2. 2. The synchronous calibrator was used in the construction of the new bridge.
   同步检定器在新桥的建设中使用了。
3. 3. The synchronous calibrator was used to ensure the accuracy of the measurements.
   同步检定器被用来确保测量的准确性。