Assertion: key | /r/CapableOf | use by radio amateurs
Facets:
value: frequently
type: TEMPORAL
Source sentences:
text: straight key style of telegraph key – model J-38, a key used by U.S. military during World War II, and frequently re-used by radio amateurs style of telegraph key – model, a key used by U.S. military during World War II, and frequently re-used by radio amateurs