2 Tuloksia löytyi "Tiedosto:Toroidal_telephone_loading_coil.jpg".

Tiedosto:Toroidal telephone loading coil.jpg

DescriptionToroidal telephone loading coil.jpg English: A loading coil for a 1922 AT&T long distance telephone trunkline between New York and Chicago...

Tiedosto:Telephone loading coils 1922.jpg

DescriptionTelephone loading coils 1922.jpg English: A loading coil for a 1922 AT&T long-distance telephone trunk cable between New York and Chicago. Loading coils...

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