Large companies from different segments have confirmed their participation in the 4th edition of the fair   A little more than four months to go before the opening of the fair, Casa Brasil has already sold 70% of its exhibit space. Companies that have confirmed their participation in one of the leading design and business fairs in Latin America include Tramontina, Eviva Bertolini, Favorita, Criare, Cinex, Magis Design.    A new action plan is being devised for the show in 2013: a group, consisting of 500 Brazilian professionals including retailers, architects, interior designers and opinion formers, will be in Serra Gaúcha to do business directly with exhibitors.    In the last edition, in 2011, Casa Brasil received more than 20,000 visitors and generated R$ 200 million in business. The 4th edition of the fair will take place from August 13 to 16, in Bento Gonçalves.