undercarriage

名词 undercarriage:

1. framework that serves as a support for the body of a vehicle

1. An undercarriage or stand on which a device rests while in service.
   底座在使用时将设备固定在其上的底座或支撑物
2. The undercarriage on light aircraft does not always retract in flight.
   轻型飞机飞行时起落架不一定缩回。