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实验验证了一向被忽视的测量装置微小的温度变化对节距累积误差测量结果所带来的严重影响;指出要从各个节距测量结果中,以逐个相加的办法获得节距累积误差,没有特殊的热防护装置是不可能获得可靠的测量结果的。——编者
Experiments have verified that the slight temperature change of the neglected measuring device has a serious impact on the measurement result of the cumulative pitch error. It is pointed out that the cumulative pitch error should be obtained one by one from each of the pitch measurement results, It is impossible to obtain reliable measurements with special thermal guards. --editor