| Institution: | 1. Air Pollution Chemical Engineer , Bureau of Air Pollution Control and Heating Inspection, Department of Safety , Cincinnati , Ohio , USA;2. Air Pollution Technician, Bureau of Air Pollution Control and Heating Inspection, Department of Safety , Cincinnati , Ohio , USA;3. Metropolitan Air Pollution Control Officer, Bureau of Air Pollution Control and Heating Inspection, Department of Safety , Cincinnati , Ohio , USA;4. Air Pollution Control and Heating Engineer, Bureau of Air Pollution Control and Heating Inspection, Department of Safety , Cincinnati , Ohio , USA |
