Assertion: foam's property | /r/HasProperty | unchanged
Facets:
value: for a long time
type: TEMPORAL
Source sentences:
text: Foam glass has an operating temperature range of -200 to 430 °C, a small expansion coefficient (8 × 10 °C) and is reversible, so the material properties are unchanged for a long time, are not easy to embrittle, and have good stability.