Examlex
Which of the following is not a fundamental component of the atom
Tractor-Trailer
A vehicle comprising a towing engine (tractor) and a trailer, used primarily for transporting goods over long distances.
Spring Brake Relay Valve
A spring brake relay valve is a component in air brake systems that controls the application and release of the spring brakes, typically used in heavy-duty vehicles for parking and emergency brakes.
Control Signal
An electrical or electronic signal used to control the behavior of a system or device, directing its operation or response.
Trailer
Any of a number of different types of nonpowered, load-carrying vehicles towed by another vehicle.
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