Industrial plants of a type which have no nuisance problems and which carry on processes within completely enclosed buildings, including the manufacture, compounding, assembly or treatment of articles of merchandise from the following previously prepared or refined materials: bone, canvas, cellophane, cloth, cork, feathers, film, felt, fur, glass, hair, horn, leather, paper, plastics, pervious or semipervious metals or stones, sheet metal, shell, textiles, wax, wire, wood (except planning mills) and yarns.