Surveying
The difference in longitude of two places expressed in time is equal to the difference in their

Apparent solar time
All listed here
Sidereal time
Mean solar time

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Surveying
A telescope is said to be inverted if its

vertical circle is to its right and the bubble of the telescope is up
vertical circle is to its right and the bubble of the telescope is down
vertical circle is to its left and the bubble of the telescope is up
vertical circle is to its left and the bubble of the telescope is down

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