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http://s6.thisnext.com/media/largest_dimension/B15B53D5.jpg
http://keetsa.com/blog/wp-content/uploads/2007/06/phonebookmagnet.jpg
http://simpsoncollegesustainability.files.wordpress.com/2011/03/9716.jpg
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Cat despre materiale, le poti identifica singur.;)