检查定位标是否对零线：将重锤放下观察定位标上刻线是否与零线重合，有偏差时可调整定位标两侧的螺钉。
Ensure that the height marker is on zero graduation: Fall down the cylinder to check, if any deviation, adjust the two screws of the height marker.
实验结果表明该算法能准确识别出对准刻线，定位精度可达微米量级，具有一定的实用价值。
The experiment result showed that this method can accurately identify the aligned lines, the positioning accuracy can reach micron grade, and has a certain practical value.
实验结果表明该算法能准确识别出对准刻线，定位精度可达微米量级，具有一定的实用价值。
The experiment result showed that this method can accurately identify the aligned lines, the positioning accuracy can reach micron grade, and has a certain practical value.
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