Assertion: telescope's mirror | /r/CapableOf | eliminate the need
Facets:
value: for a mechanical spider
type: TRANSITIVE-OBJECT
Source sentences:
text: Their flat secondary mirror is often attached to the center of the corrector lens, eliminating the need for a mechanical spider that is normally found in classic Newtonian reflectors.
text: In a Schmidt-Newtonian telescope, the flat secondary mirror is often attached to the center of the corrector lens, eliminating the need for a mechanical spider that is normally found in classic Newtonian reflector telescopes.