Assertion: portable air compressor | /r/CapableOf | use oil
Facets:
value: as a power source
type: PURPOSE
Source sentences:
text: If one is not, a portable air compressor that uses oil is a good idea.
text: Although, in general, you should begin by checking the power source; for portable air compressors which use oil as a power source, you should always check the oil level before using.