Equipment and supplies Design and construction 12 Air conditioning 7 Heating 7 Chemical engineering 5 Fluid dynamics 5 Ventilation 5 更多 ... Maintenance and repair 4 Safety measures 4 Testing 4 Chemical plants 3 Chemical process control 3 Data processing 3 Heat 3 Heat exchangers 3 Refrigeration and refrigerating machinery 3 Boilers 2 Building 2 Centrifugal pumps 2 Chemical processes 2 Chemistry 2 Chemistry, Technical 2 Combustion 2 Condensers (Steam) 2 Electric lighting 2 Energy facilities 2 Environmental aspects 2 Environmental engineering 2 Equipos y suministros 2 Extraction (Chemistry) 2 少 ...