Assertion: shock absorber's oil | /r/CapableOf | flow through the piston
Facets:
Source sentences:
text: As the shock moves up and down, the oil inside flows through the piston and the foot valve, which transfers oil from the inner tube (or working tube) and the outer tube.
text: If the piston moves fast enough, the oil flowing through the piston will cause turbulence, which increases the friction, and it will seem like the shock locks up.