1. 非常ブレーキ   sprocket   horn   handbrake   wheel   Hint Half-n-half Clue   2. 安全帽子   helmet   engine   cable   exhaust pipe   Half-n-half Clue   3. タイヤ空気圧   tire pressure   lock   horn   exhaust pipe   Half-n-half Clue   4. 鎖止め   sprocket   horn   pedal   shock absorber   Half-n-half Clue   5. 三輪車   tire pressure   tricycle   engine   shock absorber   Half-n-half Clue   6. 排気管   exhaust pipe   wheel   chain   handbrake   Half-n-half Clue   7. 車輪   handbrake   tire pressure   wheel   pedal   Half-n-half Clue