Assertion: boron | /r/ObjectUse | used in fiberglas
Facets:
value: primarily
type: DEGREE
Source sentences:
text: Boron has been, and still is, used in bleaches, fiberglass, structural and refractory materials, glass and ceramics, and organic reagents.
text: Boron is used primarily in fiberglass and boronsilicate glass which is the strong heat-resistant glass that contains a minimum of 5 percent boric oxide.