Assertion: clean room's particle | /r/HasProperty | allowed in room
Facets:
value: at one time
type: TEMPORAL
Source sentences:
text: The Class 10,000 designation and all the other airborne cleanliness classes in clean rooms and zones name their classes after the maximum number of particles allowed in the rooms at one time.
text: The airborne cleanliness classes in clean rooms and zones name their classes after the maximum number of particles allowed in the rooms at one time.