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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:43, 22 March 2010 | 2,112 × 1,960 (241 KB) | wikimediacommons>Genetics4good | {{Information |Description={{en|1=A schematic of the construction of an overhead door. Note that the 2 rails are completely seperate (the door wheels cannot move from rail 1 to rail 2). The upper wheels connect to the horizontal rails, and the lower ones |
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