Surveying
The length of a chain is measured from

centre of one handle to centre of other handle
inside of one handle to inside of other handle
outside of one handle to outside of other handle
outside of one handle to inside of other handle

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Surveying
The First Point of Aeries

Is located near the very conspicuous rectangle of stars in the constellations of Pegasus and Andromeda
All listed here
Is the point in the celestial sphere where zero meridian crosses the celestial equator
Is usually denoted by the Greek letter ?

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