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current | 13:31, 1 March 2009 | ![]() | 1,443 × 973 (253 KB) | Xmastree~commonswiki | {{Information |Description={{en|1=Inside view of an optical smoke detector.}} |Source=Own work by uploader |Author=Xmastree |Date=2009-03-01 |Permission= |other_versions= }} <!--{{ImageUpload|full}}--> |
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