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Q. |
The error due to eccentricity of inner and outer axes can be eliminated by |
A. | reading both verniers and taking the mean of the two |
B. | taking both face observations and taking the mean of the two |
C. | double sighting |
D. | taking mean of several readings distributed over different portions of the graduated circle |
Answer» A. reading both verniers and taking the mean of the two |
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