Assertion: rotary union | /r/HasProperty | hydraulic coupling
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: A rotary union is sometimes referred to as a rotating union, rotary valve, swivel union, rotorseal,rotary couplings, rotary joint, rotating joints, hydraulic coupling, pneumatic rotary union, through bore rotary union, air rotary union, electrical rotary union, or vacuum rotary union