1 “... for the refrigerant CFC-12, and the Air Force is planning to substitute hydrochlorofluorocarbon (HCFC)-123...”

2 “... for the refrigerant CFC-12, and the Air Force is planning to substitute hydrochlorofluorocarbon (HCFC)-123...”

3 “..., authoritative studies on issues in toxicology for the Army, Navy, Air Force, NASA, EPA, and other governmental...”

4 “..., authoritative studies on issues in toxicology for the Army, Navy, Air Force, NASA, EPA, and other governmental...”