Assertion: rotary lobe compressor | /r/CapableOf | call roots blowers
Facets:
value: after the roots blower company
type: OTHER
value: ’re often
type: DEGREE
Source sentences:
text: Rotary Lobe compressors have been in use ever since, and they’re often called Roots Blowers after the Roots Blower Company the brothers founded to initially sell them.