Verin schema
Source google image: https://image.slidesharecdn.com/bibliothquehydraulique-140614110836-phpapp01/95/bibliothque-hydraulique-8-638.jpg?cb=1402744145
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Verin schema
Source google image: https://image.slidesharecdn.com/bibliothquehydraulique-140614110836-phpapp01/95/bibliothque-hydraulique-8-638.jpg?cb=1402744145