Assertion: autoclave's chamber | /r/HasProperty | sealed
Facets:
Source sentences:
text: Once the chamber is sealed, all the air is removed from it either by a simple vacuum pump (in a design called pre-vacuum) or by pumping in steam to force the air out of the way (an alternative design called gravity displacement).
text: Pre-vacuum (or high-vacuum) autoclaves have a pump that is used to evacuate air after the chamber is sealed but before heating.