632
First Class Stationary Boilers
633
First Class Steam Turbine Engines
634
First Class Internal Combustion
635
First Class Stationary Refrigeration
636
First Class Stationary Air
637
Second Class Steam Turbine Engines
639
Second Class Stationary Refrigeration
640
Second Class Air Conditioning
641
Third Class Stationary Boilers
645
Third Class Stationary Air
661
Second Class Stationary Boilers