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A. when the instrument is being shifted, the staff must not be moved B. when the staff is being carried forward, the instrument must remain stationary

Posted by Civil Engineer
Asked on June 16, 2016 2:26 pm
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A. when the instrument is being shifted, the staff must not be moved
B. when the staff is being carried forward, the instrument must remain stationary

Posted by Civil Engineer
Answered on June 17, 2016 2:12 pm