Assertion: steam engine's steam | /r/HasProperty | introduced
Facets:
value: between the two vanes
type: LOCATION
Source sentences:
text: At the end of the power stroke, the weight of the object being moved by the engine, pulled the piston to the top of the cylinder, as steam was introduced.
text: When steam was introduced between the two vanes, as shown in Fig 4 at left, it tended to push them apart, but only one of them could move.