螺距规

例句：

1. 1. The engineerused a screwdriver to tighten the bolts on the machine.
   工程师用螺丝刀拧紧了机器上的螺栓。
2. 2. The toolis essential for measuring the accuracy of thescrews.
   这个工具对于测量螺丝的精度至关重要。
3. 3. The technician carefully checked thetolerance of the thread before installing the newpart.
   技术员仔细检查了螺纹的公差，然后才安装新部件。