фетрове масляне кільце
felt buffer
felt disc
felt element
felt seal
felt wad
felt wiper
take felt
base junction; rotary collector ring (box); rotary base junction (of a tank); rotary connection; slip ring; traverse rotary base junction
life ring (ring buoy)
oil control piston ring
oil scraper piston ring
engine oil reservoir / engine oil tank
oil gauge / oil-gauge
base ring
breech ring (of firearm)
D-ring
gun ring
jet ring
retaining ring
safety-pin ring
stator ring
stiffener ring
X ring
defense ring
power-slip ring
slinger ring
slip ring
slip-ring box
slip-ring terminal
fire extinguishing ring
sprocket ring
tie-down ring