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1 132. 下表為測站B對測點A、C做水平角之紀錄,則∠ABC為
A 1 2 5 ° 1 0 ' 1 0 "
B 1 2 5 ° 1 0 ' 1 5 "
C 1 2 5 ° 1 0 ' 2 0 "
D 1 2 5 ° 1 0 ' 2 5 "