Assertion: steam engine's piston | /r/CapableOf | travel in one direction
Facets:
Source sentences:
text: The stroke is simply the distance between the TDC and the BDC, or the greatest distance that the piston can travel in one direction.
text: In 1828, James Perkins developed the Uniflow engine that used a half-cylinder and allowed the piston to move in only one direction.