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SU843293A1
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Способ трансл ции импульсов набора номераВ АВТОМАТичЕСКиХ ТЕлЕфОННыХ СТАНци Х иуСТРОйСТВО дл РЕАлизАции
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Switch control mechanism for automatic telephone systems
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Installation de télécommunication automatique pour communications exploitées en courant alternatif.
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