flat ness measuring instrument

例句：

1. 1. The engineer used aflatness measuring instrument to check the accuracyof the machine.
   工程师使用一个平面度测量仪器来检查机器的准确性。
2. 2. The flatnessmeasuring instrument was crucial for ensuring the qualityof the finished product.
   平面度测量仪器对于确保成品的质量至关重要。
3. 3. The techniciancarefully read the instructions andused the flatness measuring instrumentto measure the surface flatness ofthe workpiece.
   技术员仔细阅读了说明书，并使用平面度测量仪器测量工件的表面平整度。