Assertion: radio's receiver | /r/HasProperty | first designs
Facets:
Source sentences:
text: The T.R.F. (tuned radio frequency) receiver was among the first designs available in the early days when means of amplification by valves became available.
text: The T.R.F. (tuned radio frequency) receiver was among the first designs available in the early days when means of amplification by valves became available.