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plant for the production on an industrial scale of cassettes containing the wall back and sides, drawn from a sheet of faesite and equivalent material bent to u and having the warheads inngoli pieces of plastic and applied to the ends of said step together bent to u
plant for the production on an industrial scale of cassettes containing the wall back and sides, drawn from a sheet of faesite and equivalent material bent to u and having the warheads inngoli pieces of plastic and applied to the ends of said step together bent to u