Assertion: reciprocating piston compressor | /r/HasProperty | available
Facets:
value: commonly
type: DEGREE
value: as oil-lubricated
type: MANNER
Source sentences:
text: Reciprocating piston compressors are commonly available as either oil-lubricated or non-lubricated; for high pressure (350 - 700 bar), non-lubricated compressors are preferred to avoid oil contamination of the hydrogen.