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E- waste
E-waste What contributes to e-waste? Discarded electronic devices like televisions, personal computers, floppies, audio-video CDs, batteries, electric switches, telephones, air conditioners, cellphones, electronic toys, refrigerators, washing machines, dryers, kitchen utensils and eve..
Telephone Lines
Telephone Lines - The transmission lines used in telephony are of two kinds: open- wire and cable. The open-wire lines are gradually being superseded by cable construction, either overhead or underground, for two principal reasons. In the first place, many more circuits can be accommodated-there is..
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