/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: ralfhcanuto https://cdn.slidesharecdn.com/profile-photo-ralfhcanuto-48x48.jpg?cb=1523604969 Sou Engenheiro Sanitárista e Ambeintal e Engenheiro de Segurança do Trabalho.