Construction information; Repair information; Heating equipment installation and repair; Electric appliance installation and repair; Installation and repair of air-conditioning apparatus; Installation, maintenance and repair of computer hardware; Installation of lighting systems; Underwater repair; Maintenance and repair of communications systems; Rental of air compressors

Lighting apparatus and installations; Germicidal lamps for purifying air; Cooling installations and machines; Ventilation (air-conditioning) installations and apparatus; Cooking utensils, electric; Heating installations; Water supply installations; Bath installations; Water purification installations; Sanitary apparatus and installations