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current | 09:34, 6 February 2010 | 990 × 600 (82 KB) | Jwhferguson | {{Information |Description={{en|1=Diagram of water temperatures comparing flat-plate and evac tube solar water heaters: cloudy day.}} |Source=http://www.its-solar.com/wp-content/uploads/flat-plate-vs-evacuated-tube1.pdf |Author=ITS-solar Ltd, South Afric |
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