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billso 's Library tagged germany →  View Popular

Glowing temperature-sensitive sink-fixtures

  • Faucets change color depending upon the water temperature. - billso on 2006-07-25

Dazzle Camouflage

  • The British and US fleets used dazzle camouflage during World War I to make it more difficult for German U-boats to torpedo ships at sea. - billso on 2006-07-25
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