Manufacture of doors and windows of metal

Title: Manufacture of metal doors and windows Includes the manufacture of doors, windows, frames, shutters and gates and elements of similar metal construction. Includes metal dividers to be fixed to the floor, blinds metals, insect protection nets and temporary space extensions made of metal. Does not include:  Manufacture of boat parts (301);  Assembly and installation of automatic and revolving doors (43240);  Installation of non-automatic doors and windows (43320);