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In the Twentieth Century, the Presidency Has Usually Been Seen

question 27

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In the twentieth century, the presidency has usually been seen as


Definitions:

Service Application Valves

Valves used in the maintenance and repair process of various systems, allowing for the control or direction of flow during service.

Spike

A sudden surge in hydraulic pressure or electrical voltage. Also a slang term meaning the tractor steering column mounted, trailer service brake valve.

Tractor Protection Valve (TP)

A safety device on tractor-trailer combinations that protects the air brake system from losing air pressure in the event of a trailer breakaway or leak.

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