Assertion: rotary vane compressor | /r/ObjectUse | used for stage
Facets:
value: ie
type: OTHER
Source sentences:
text: the images at http://www.sullairinfo.com/industrial/tandem_200804/LIT_TS_TS01E.pdf and http://www.tpub.com/content/NAVFAC/mo206/mo2060037.htm also makes me wonder on the cost/efficiency of using different compressors for each stage (ie a rotary vane compressor could be used for stage 1, followed by a screw compressor for stage 2 or 3).