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A comment on 100 Years Ago, a Telephone Tower in Stockholm Connected 5000 Phone Lines (2014).

Re:100 Years Ago, a Telephone Tower in Stockholm Connected 5... by Animats on Sunday August 11, 2019 @12:47AM (#20666291)
Insulation was a big problem before plastics. Varnished cloth, mostly. Hence so much open wire.
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