Chassis
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A chassis, is the load-bearing framework of a manufactured object, which structurally supports the object in its construction and function.
The CTC-2 chassis of an RCA CT-100 television
Motor vehicle chassis with its suspension, exhaust system, and steering box
An ATX computer case
Vehicle frame
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A vehicle frame, also historically known as its chassis, is the main supporting structure of a motor vehicle to which all other components are attached, comparable to the skeleton of an organism.
Chassis
…load-bearing framework of a manufactured object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear, such as wheels and transmission, and sometimes even the driver's…
Ladder frame pickup truck chassis holds the vehicle's engine, drivetrain, suspension, and wheels
The unibody - for the unitized body - is also a form of a frame
A ladder frame, named for its shape
Pickup truck frame, with heavy c-shaped longitudinal rails (slightly arced over the rear axle), a similarly sized c-shaped crossmember just forward of the axle, and a tophat-shaped smaller gauge crossmember towards the rear