FI880355A - Foerfarande och apparat foer pao samma telefonlinje skeende automatisk styrning medelst elektriska signaler till olika kommunikationsapparater.
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Foerfarande och apparat foer pao samma telefonlinje skeende automatisk styrning medelst elektriska signaler till olika kommunikationsapparater.
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FI880355A1988-01-271988-01-27Foerfarande och apparat foer pao samma telefonlinje skeende automatisk styrning medelst elektriska signaler till olika kommunikationsapparater.
FI880355A
(fi)