The undirectional measurement is a problem which often be seen in the engineering measurement.
无定向测量是工程测量中一种较常遇到的问题。
Several typical methods of undirectional measurement were introduced in this paper, and their characteristics and scope of application were expounded.
本文介绍了几种比较典型的无定向测量方法，阐明各自的特点和适用范围。
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