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open-circuit signalling

См. также в других словарях:

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  • Automatic Block Signal — Basic Automatic Block Signals = Automatic Block Signal, or ABS, systems consist of a series of signals that govern blocks of track between the signals. The signals are automatically activated by the conditions of the block beyond the signal.… …   Wikipedia

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  • Reflected-wave switching — is a signalling technique used in backplane computer buses such as PCI. A backplane computer bus is a type of multilayer printed circuit board that has at least one (almost) solid layer of copper called the ground plane, and at least one layer of …   Wikipedia

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