Assertion: clean room's particle | /r/HasProperty | permitted per volume of air
Facets:
Source sentences:
text: Cleanrooms are classified according to the number and size of particles permitted per volume of air.
text: Cleanrooms are classified according to the number and size of particles permitted per volume of air.
text: A clean room is classified by the number and size of particles permitted per volume of air.
text: Clean rooms are classified according to the number and size of particles permitted per volume of air.