The most important line in a survey is
ABase line
BProof line
CCheck line
DTie line
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Related Questions:
The angle between two mirrors of an optical square is equal to:
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The instrument used to determine area of the irregular figure or boundary is:
The imaginary line joining the point of inter section of crosshair at diaphragm and the optical centre of the object glass and its continuation is
Smallest length that can be drawn on map is