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Explanatory articles
Armillary Sphere
Astrolabe
Astronomical Compendium
Compass
Cross-Staff
Dividers
Drawing Instruments
Graphometer
Gunner's Sight and Level
Nautical Hemisphere
Nocturnal
Plane Table
Primum Mobile
Quadrant
Radio Latino
Sector
Sundial
Theodolite
Time and Date
Triangulation Instrument
Universal Instrument
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