Equipment and supplies Design and construction 5 Heat 3 Air conditioning 2 Boilers 2 Chemical plants 2 Chemical processes 2 rhagor ... Combustion 2 Condensers (Steam) 2 Fluid dynamics 2 Heating 2 Maintenance and repair 2 Materials 2 Petroleum pipelines 2 Pipelines 2 Piping 2 Plumbing 2 Pumping machinery 2 Refrigeration and refrigerating machinery 2 Steam 2 Steam engineering 2 Steam power plants 2 Steam-boilers 2 Storm sewers 2 Strains and stresses 2 Testing 2 Transmission 2 Ventilation 2 Water-supply engineering 2 Absorption and adsorption 1 llai ...