Assertion: pencil's eraser | /r/ObjectUse | used in addition
Facets:
value: for cleaning traces
type: PURPOSE
value: to removing pencil and pen markings
type: PURPOSE
Source sentences:
text: The fibres are very hard; in addition to removing pencil and pen markings, such erasers are used for cleaning traces on electronic circuit boards to facilitate soldering, removing rust, and many other applications.