A level line is a
AHorizontal line
BLine parallel to mean surface of earth
CLine passing through the centre ofcrosshair and centre of eyepiece
DThe line passing through the obective lens and eye piece of a dumpy level
AHorizontal line
BLine parallel to mean surface of earth
CLine passing through the centre ofcrosshair and centre of eyepiece
DThe line passing through the obective lens and eye piece of a dumpy level
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