Assertion: ring's material | /r/CapableOf | seal the piston
Facets:
value: inside a pneumatic cylinder
type: LOCATION
Source sentences:
text: When sealing the piston inside a pneumatic cylinder, a soft and flexible material is required to prevent leakage, but those same properties may leave the seal material vulnerable to being pulled out of its seat and then pinched or torn in the narrow space between piston and cylinder wall.