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Ceramic material and capacitor comprised thereof
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Temperature-Independent Capacitor and Capacitor Module
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Main door telephone system - has sound transducers used simultaneously as microphone and loudspeaker
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Station for intercom or door telephone system - has base plate carrying circuit and loudspeaker with one piece moulded cover including operating keys
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Telephone station for intercommunication system - has a housing with a back base plate and a cover
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