| 变 |
biàn sù qì | gearbox / speed changer / gear |
| 变 |
biàn | to change / to become different / to transform / to vary / rebellion |
| 变 |
biàn sù | to change speed / to shift gear / variable-speed |
| 速 |
sù | fast / rapid / quick / velocity |
| 器 |
qì | device / tool / utensil / CL:台 |