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self-oscillating
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Join Date: Jul 2014
Posts: 55,022
Favourites:
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self-oscillating
Join Date: Jul 2014
Posts: 55,022
Favourites:
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most people in the uk have given up their copper land lines. BT is the only consumer telecoms company that still supports copper. There is no equipment at telephone exchanges to support copper any more. Copper wire for communications is technology from 60 years ago
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