胶圈

胶圈	jiāo quān	rubber ring / gasket
胶	jiāo	glue; gum / to glue; to stick / (bound form) rubber
圈	juān	to confine / to lock up / to pen in
圈	juàn	livestock enclosure; pen; fold; sty
圈	quān	circle; ring; loop / (fig.) social circle; niche group; community; fandom / classifier for loops, orbits, laps / to surround; to encircle / to circle (sth); to mark with a circle