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Q. |
A’level line’is a |
A. | horizontal line |
B. | line parallel to the mean spheriodal surface of earth |
C. | line passing through the center of cross hairs and the center of eye piece |
D. | line passing through the objective lens and the eye-piece of a dumpy or tilting level |
Answer» B. line parallel to the mean spheriodal surface of earth |
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