| 1651 | Tungsten Electrode | Company Product |
| 1652 | Tungsten Halogen Light Fittings | Company Product |
| 1653 | Tungsten Halogen Lights | Company Product |
| 1654 | Tungsten Inert Gas Welding | Company Product |
| 1655 | Tuning Fork | Company Product |
| 1656 | Tuning Forks | Company Product |
| 1657 | Tunnel | Company Product |
| 1658 | Tunnel Boring Equipment | Company Product |
| 1659 | Tunnel Boring Equipments | Company Product |
| 1660 | Tunnel Boring Machines | Company Product |
| 1661 | Tunnel Concrete Mixer Systems | Company Product |
| 1662 | Tunnel Fans | Company Product |
| 1663 | Tunnel Mixers | Company Product |
| 1664 | Tunnel Protection | Company Product |
| 1665 | Tunnelling Contractors | Company Product |
| 1666 | Tunnelling Equipment | Company Product |
| 1667 | Turbidimeters | Company Product |
| 1668 | Turbidity Controls | Company Product |
| 1669 | Turbidity Meter | Company Product |
| 1670 | Turbidity Meters | Company Product |
| 1671 | Turbidity Sensor | Company Product |
| 1672 | Turbidity Sensors | Company Product |
| 1673 | Turbidity Suspended Solids Analyzer | Company Product |
| 1674 | Turbine | Company Product |
| 1675 | Turbine Bypass | Company Product |
| 1676 | Turbine Casings | Company Product |
| 1677 | Turbine Drive Generators | Company Product |
| 1678 | Turbine Flowmeter | Company Product |
| 1679 | Turbine Flowmeters | Company Product |
| 1680 | Turbine Meters | Company Product |