圆弧测定器

例句：

1. 1. The engineer used a circle radius measurer to check the accuracy of the machine.
   工程师使用圆弧半径测量仪来检查机器的准确性。
2. 2. The technician was asked to use the circle radius measurer to find the exact center ofthe circle.
   技术人员被要求使用圆弧半径测量仪来找到圆的精确中心。
3. 3. The student demonstrated how to use the circle radius measurer to calculate the radius of a circle.
   学生展示了如何使用圆弧半径测量仪来计算圆的半径。