Also known as: PB-
PB has various meanings in the Engineering category. Discover the full forms, definitions, and usage contexts of PB in Engineering.
A switch, in the shape of a bar, used to cut off power at the machine in case of an emergency.
EngineeringA device that uses engine vacuum to assist you in braking the vehicle. Helps the brake pedal to activate the hydraulic pistons in the master cylinder .
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