Assertion: high precision sextant | /r/HasAspect | invar
Facets:
Source sentences:
text: High-precision sextants have an invar (a special low-expansion steel) frame and arc.
text: High-precision sextants have an invar (a special low-expansion steel) frame and arc.
text: High-precision sextants have an invar (a special low-expansion steel) frame and arc.
text: High-precision sextants have an invar (a special low-expansion steel) frame and arc.