Alan Rainey

Alan Rainey

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Alan Rainey
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interesting for people near rivers - this is a river turbine - and its safe for animals

While trying to find a method for aerating water without energy input, Austrian engineer Franz Zotlöterer stumbled across the idea of a mini-power plant which is simple to construct and has a turbine efficiency of but which is safe for fish due to

10 Tips and Tricks for Making Difficult Selections and Masks

If you’re just starting out in Photoshop and would like to learn the art of making difficult selections to isolate things in photos, check out this great video tutorial by Tutvid.