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采用误差分离原理，对大型工件的几何精度实施在位测量，可以将基准的误差从测量结果中分离出来，从而减少测量不确定度，提高测量精度。
Using the error separation principle, the in-place measurement of the geometric precision of a large workpiece can be used to separate the reference error from the measurement result, thereby reducing the measurement uncertainty and improving the measurement accuracy.