Building Maintenance
Includes maintenance of buildings only, excluding any equipment or extensions available inside, such operations include restoration and reparations of roofs, columns, walls, floors and others.
Electromechanical Equipment Installation and Maintenance
Includes installation & maintenance of mechanical and electromechanical equipment, such as workshop equipment, factories, power generators, loading, lifting and towing equipment, cold rooms, refrigeration equipment, central kitchens, automatic laundry equipment, etc.
Plumbing & Sanitary Installation
Includes fixing water pipes at home and sanitary installation such as washbasins, bathtubs, lavatories, tapes, spigots, and bathroom and kitchen articles.