Assertion: telescope's mirror | /r/HasAspect | multiple mounting points
Facets:
value: on the back
type: LOCATION
Source sentences:
text: This created a honeycomb mirror that cut the amount of Pyrex needed down from over 40 short tons (36 t) to just 20 short tons (18 t), making a mirror that would cool faster in use and have multiple "mounting points" on the back to evenly distribute its weight (note – see external links 1934 article for drawings).