- "COMBO DRIVERS " the means from the metaphrase on literal " coupled axle drive implement " , it is used to to call by people " Kang Bao " .
- The back axle of the bus was broken.
- The dining-car was coupled on (to the last coach).
- The garage mechanic find a crack in the back axle of the car.
- They coupled the carriages of the train together.
- The part of a machine shaft or axle supported by a bearing.