1. 把手   tire pressure   handlebar   handbrake   horn   Hint Half-n-half Clue   2. 盔甲   helmet   engine   gear lever   tire   Half-n-half Clue   3. 阀门   valve   inner tube   wheel   tire pressure   Half-n-half Clue   4. 手刹车   handbrake   pedal   seat   inner tube   Half-n-half Clue   5. 轮子   wheel   pump   chain   spoke   Half-n-half Clue   6. 锁   shock absorber   spoke   cable   lock   Half-n-half Clue   7. 内胎   handbrake   wheel   engine   inner tube   Half-n-half Clue