фетрове масляне кільце
base junction; rotary collector ring (box); rotary base junction (of a tank); rotary connection; slip ring; traverse rotary base junction
life ring (ring buoy)
felt buffer
felt disc
felt element
felt seal
felt wad
felt wiper
take felt
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
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