Electric appliance installation and repair; office machine and equipment installation, maintenance and repair; installation, maintenance and repair of machinery used in the warehouse construction industry, the harbor construction industry, the factory construction industry, the embankment construction industry and the paving industry and excluding machinery used to install, maintain or repair cast-iron and steel products, namely, cast-iron and steel covers and frames for manholes, pits, ducts and in-ground telecommunications systems, cast-iron and steel pavior covers, cast-iron and steel gratings and frames for use in connection with gullies, catch pits, sumps, and tree beds, cast-iron surface boxes for underground gas and water pipes, cast-iron equipment for railways, namely, rail bearing plates, ornamental and decorative cast-iron, namely, cast-iron legs for park benches and bollards, cast-iron fireplace equipment, namely, decorative fireplace plaques and irons, cast-iron steel and aluminum steps for access to underground systems