Assertion: steam engine's cylinder | /r/CapableOf | inject steam
Facets:
value: to move the piston
type: PURPOSE
Source sentences:
text: James Watt's design improvements increased the efficiency of the steam engine, improving the power-to-weight ratio, and created an engine capable of rotary motion by using a double-acting cylinder which injected steam at each end of the piston stroke to move the piston back and forth.