FI943960A0 -
Foerfarande Foer foermedling av telefonfontjaenster medelst en telefonvaexel oc ett ett underordnat concentratornaet i en avbrottssitutation
- Google Patents
Foerfarande Foer foermedling av telefonfontjaenster medelst en telefonvaexel oc ett ett underordnat concentratornaet i en avbrottssitutation
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FI943960A1994-08-291994-08-29
Foerfarande Foer foermedling av telefonfontjaenster medelst en telefonvaexel oc ett ett underordnat concentratornaet i en avbrottssitutation
FI943960A0
(en)