Because of many reasons in the course of straightness error measuring, many original observed data deviate from actual value and are difficult to process.
由于在直线度误差测量过程中的各种原因，导致许多观测数据与实际值偏离或者很难进行处理。
Because of many reasons in the course of straightness error measuring, many original observed data deviate from actual value and are difficult to process.
由于在直线度误差测量过程中的各种原因，导致许多观测数据与实际值偏离或者很难进行处理。
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