英文：A time measurement for a given computer word to pass a given point as in serial storage delay-lines. All of the bits of a word must pass through the input control gate; the beat is then the sum of all the bits times.
英文：An interface unit or circuitry that converts data to and from the representation used by a particular peripheral device or class of peripheral devices; for example, a device that converts between bit serial and bit parallel and resolves differences in tra
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