DJ6光学经纬仪的度盘分划并标注到(),分微尺上每小格为1′。A.6°B.1°C.12°D.18°
DJ6光学经纬仪的度盘分划并标注到(),分微尺上每小格为1′。
A.6°
B.1°
C.12°
D.18°
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