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overheadprojector
[DIY Machine]DIY overhead projector
Cost Control: wood scraps 5 yuan, iron 3 yuan, and then 10 yuan to buy the old pair of scissors, in the metal screw bought 3 yuan. A hard one night, the chassis on the ok. Then, after the installation of optical path calculation, a bottle of white...
NEW:2008-06-08 15:00:53  View Content...