different between backplane vs backplate

English

back +? plane

backplane (plural backplanes)

(electronics) A circuit board that connects several connectors in parallel to each other, so that each pin of each connector is linked to the same relative pin of all the other connectors, forming a computer bus.

back +? plate

backplate (plural backplates)

A plate protecting a fighting person's back.
(underwater diving) A plate harnessed to a diver's back, to which the gas cylinders are attached.
A metal plate on the rear of a computer's casing, used to cover a port or slot.
A wood or metal plate that serves as a backing for an object.
(Britain, automotive) A rigid metal plate inside the brake drum, which supports the wheel cylinder, brake shoes, and other parts of a drum brake.
Part of a condenser microphone that sits behind the diaphragm and which acts, in conjunction with the diaphragm, as a sort of variable capacitor.

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