Assertion: cobalt | /r/ObjectUse | used as binder
Facets:
value: for tungsten carbide crystals
type: TRANSITIVE-OBJECT
value: among 12 workers
type: OTHER
Source sentences:
text: Among 12 workers engaged in the manufacture or grinding of tungsten carbide tools (cobalt is used as a binder for tungsten carbide crystals), who developed interstitial lung disease, there were eight fatalities.