Assertion: torch's flame | /r/HasProperty | good all-purpose systems
Facets:
value: for most goldsmiths
type: TRANSITIVE-OBJECT
Source sentences:
text: Propane and natural gas produce carbon-free flames, which, although lower temperature than acetylene’s (5252°F for propane, 5120°F for natural gas), are good all-purpose systems for most goldsmiths.