Assertion: ball bearing's ball | /r/HasProperty | expensive
Facets:
value: extremely
type: DEGREE
Source sentences:
text: Cages, or retainers, can also be manufactured from sacrificial solid lubricants: Ball bearing retainers manufactured from Teflon, PGM or Salox M are extremely expensive and are used only in very specialized expensive equipment.
text: Quality ceramic balls are expensive to produce.