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Automatic telephone exchanges. General requirements for interworking between digital and cross-bar automatic telephone exchanges
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Electromagnetic compatibility of multimedia equipment. Emission requirements
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Reprography. Micrography. Roll microfilms for newspapers. General requirements and standards
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Railway telecommunication. Safety requirement control methods
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Triode thyristors. Method for measuring turn-on, rise and delay time
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Reprography. Copirography. Means of document duplication. General specifications
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