| 781 | Air System Equipment | Company Product |
| 782 | Air Tanks | Company Product |
| 783 | Air Testing | Company Product |
| 784 | Air Tight Manhole Covers | Company Product |
| 785 | Air Tight Manhole Frames | Company Product |
| 786 | Air Tools | Company Product |
| 787 | Air Travel Ticket Agencies | Company Product |
| 788 | Air Treatment Accessories | Company Product |
| 789 | Air Treatment FIlter Lubricators | Company Product |
| 790 | Air Treatment FIlter Reducers | Company Product |
| 791 | Air Treatment FIlters | Company Product |
| 792 | Air Treatment Lubricators | Company Product |
| 793 | Air Treatment Pressure Gauges | Company Product |
| 794 | Air Treatment Pressure Reducers | Company Product |
| 795 | Air Treatment Pressure Switches | Company Product |
| 796 | Air Treatment Shut-Off Valves | Company Product |
| 797 | Air Treatment Soft-Start Valves | Company Product |
| 798 | Air Treatment Unit | Company Product |
| 799 | Air Treatment Units Accessories | Company Product |
| 800 | Air Treatment Units Spare Parts | Company Product |
| 801 | Air Tube Conveying Systems | Company Product |
| 802 | Air Tube Document Conveying Systems | Company Product |
| 803 | Air Tube Document Conveyors | Company Product |
| 804 | Air Tubing | Company Product |
| 805 | Air Tubings | Company Product |
| 806 | Air Units | Company Product |
| 807 | Air Vacuum Generators | Company Product |
| 808 | Air Valve | Company Product |
| 809 | Air Valves | Company Product |
| 810 | Air Velocity Meters | Company Product |