Where do i get the recipe ? ???
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Uhmm for alliance you get it in Wildhammer Stronghold in SMW, so i guees it the same for the Horde, just in the horde city (dunno what it is called) It's a gnome near the forge. (Next time try checking wowhead.com )
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http://www.wowhead.com/?item=34061#taught-by-npc