inner tube
Word family adverbinnerlyadjectiveinnermostinnernouninnernessinner childinner cityinner tubeinnerwear
Motor vehicles
ˈinner tube noun [countableC] 
TTCa rubber tube filled with air that is inside a tyre 〔轮胎的〕内胎Examples from the Corpus
inner tube• Cut a 5/8in wide band of bicycle inner tube.• The mix is pumped gently down the inner tube, out through the bottom and up the outer tube.• The inner tube is negatively charged and the outer tube is made positive.