Assertion: engine's valve | /r/CapableOf | distribute the steam
Facets:
value: by opening
type: MANNER
value: by steam ports
type: LOCATION
value: by closing
type: TEMPORAL
Source sentences:
text: These events are controlled by valves often working inside a steam chest adjacent to the cylinder; the valves distribute the steam by opening and closing steam ports communicating with the cylinder end(s) and are driven by valve gear, of which there are many types.[citation needed]