首页/ 题库 / [单选题]水平角观测时,各测回间改变零方向度盘位置的答案

水平角观测时,各测回间改变零方向度盘位置是为了削弱()误差影响。

单选题
2021-07-17 22:10
A、视准轴
B、横轴
C、指标差
D、度盘分划
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正确答案
D

试题解析

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