the frame that a vehicle is built on （车辆的）底盘，底座，底架 The company makes chassis for motorhomes, ambulances and other large vehicles. 该公司生产野营车、救护车和其他大型车辆的底盘。
Oxford Collocations DictionaryChassis is used after these nouns:- truck
the outer frame of a piece of computer, radio or audio equipment （车辆的）底盘，底座，底架 a computer/printer chassis 电脑／打印机机箱
Word Originearly 20th cent.: from French châssis ‘frame’, based on Latin capsa ‘box’, related to capere ‘to hold’.