top | item 28192243 London's Newest Library Has a Copper Lined Room That Blocks Messages and Emails 2 points| aries1980 | 4 years ago |londonist.com 1 comment order hn newest simonblack|4 years ago "Copper Lined Room" = run-of-the-mill Faraday cage.https://en.wikipedia.org/wiki/Faraday_cage
simonblack|4 years ago "Copper Lined Room" = run-of-the-mill Faraday cage.https://en.wikipedia.org/wiki/Faraday_cage
simonblack|4 years ago
https://en.wikipedia.org/wiki/Faraday_cage