Assertion: steam engine's piston | /r/CapableOf | cover port
Facets:
value: in the cylinder wall
type: LOCATION
value: in two-strokes
type: MANNER
Source sentences:
text: The flow of gases through the engine is controlled by valves in four-stroke engines, and by the piston covering and uncovering ports in the cylinder wall in two-strokes.
text: The flow of gases through the engine is controlled by valves in four-stroke engines, and by the piston covering and uncovering ports in the cylinder wall in two-strokes.