To avoid large centering error with very short legs, observations are generally made

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Question:To avoid large centering error with very short legs, observations are generally made

1.to chain pins

2.by using optical system for centering the theodolite

3.to a target fixed on theodolite tripod on which theodolite may be fitted easily

4.all the above.

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  1. To avoid large centering error with very short legs, observations are generally made
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