垫圈

to spread litter in a cowshed, pigsty etc

washer (on bolt) / toilet seat

pad / cushion / mat / to pad out / to fill a gap / to pay for sb / to advance (money)

to confine / to lock up / to pen in

pen (pig) / a fold

circle / ring / loop / classifier for loops, orbits, laps of race etc / CL:個|个[ge4] / to surround / to circle

circle; ring; loop (CL:個|个[ge4]) / classifier for loops, orbits, laps of race etc / to surround; to circle

spring washer