Assertion: air compressor's pressure | /r/CapableOf | fill the area
Facets:
value: above the piston
type: LOCATION
Source sentences:
text: This allows outside air at atmospheric pressure to push open the inlet valve and fill the area above the piston.
text: As the piston moves down, a vacuum is created above it, allowing outside air at atmospheric pressure to push open the inlet valve and fill the area above the piston.