Assertion: engine | /r/HasProperty | constructed after various modifications
Facets:
value: efficiently
type: MANNER
Source sentences:
text: The first engine of this kind which, after various modifications, was efficiently constructed and heated, had a cylinder of 30 centimetres (12 inches) in diameter, with a length of stroke of 60 centimetres (2 ft), and made 40 strokes or revolutions in a minute (40 rpm).