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0 pointsCamperBob22d ago0 comments

Cathodic protection against corrosion was the goal of using -48V, in the telcos' case.

0 comments

And the telegraph lines before that.

j / k navigate · click thread line to collapse

0 pointsCamperBob22d ago0 comments

Cathodic protection against corrosion was the goal of using -48V, in the telcos' case.

And the telegraph lines before that.

j / k navigate · click thread line to collapse