Assertion: silica's stability | /r/HasProperty | required
Facets:
Source sentences:
text: High-grade fused silica may be used on its own for the production of glass where a high thermal stability and shock resistance is required such as in the windows of the NASA Shuttle.
text: High-grade fused silica may be used on its own for the production of glass where high thermal stability and shock resistance is required (as in manned spacecraft).