Assertion: air engine | /r/HasProperty | tested with working fluids
Facets:
value: by that time
type: TEMPORAL
Source sentences:
text: In the 1940s, the Philips company was seeking a suitable name for its own version of the 'air engine', which by that time had been tested with working fluids other than air, and decided upon 'Stirling engine' in April 1945.