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Schneider-Orelli's formula

1 Guide: Display Guide sheet.
2 Abbott: Display Abbott's formula sheet.
3 Henderson-Tilton: Display Henderson-Tilton's formula sheet.
4 Sun-Shepard: Display Sun-Shepard's formula sheet.
How to use Just fill out the requested data in fields no. 5 then press button no.6
7 Exit: Exit control correction. Back to main window.

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