Surveying
At the first point of Aeries, the sun moves

From south to north of the equator
Southward
Northward
From north to south of the equator

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Surveying
Normal tension is that pull which

is used at the time of standardising the tape
neutralizes the effect due to pull and sag
makes the correction due to sag equal to zero
makes the correction due to pull equal to zero

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