roundness measurement

例句：

1. 1. The engineer used a special tool to measure the exact roundness of the circle.
   工程师使用特殊的工具来精确测量圆的圆度。
2. 2. In order to ensure the quality of the product, it is necessary to measure the roundness of the metal before welding.
   为了确保产品质量，在焊接之前需要测量金属的圆度。
3. 3. The manufacturer uses a roundness measurement device to ensure that the finished product meets industry standards.
   制造商使用圆度测量设备来确保成品符合行业标准。