Each measurement has a different measure point. In normal practice, each measurement is shifted in depth by the distance between the measure point and the reference point.
每种测量有不同的测量点，一般地，在实际应用中，每一次测量在深度上要偏移一段测量点到参考点之间的距离。
Each measurement has a different measure point. In normal practice, each measurement is shifted in depth by the distance between the measure point and the reference point.
每种测量有不同的测量点，一般地，在实际应用中，每一次测量在深度上要偏移一段测量点到参考点之间的距离。
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