The mechanical works sector is also distinguished by its comprehensive quality through its creativity in the design, supply, installation, duct work, and maintenance of central air conditioning systems and various types of refrigeration equipment for buildings, factories, and large companies. The sector also supplies and installs all mechanical equipment and water treatment plants, and implements cooling and water recycling piping networks, pumps, and desalination plants. The sector also includes a select group of technicians specialized in the maintenance of these devices.