| 2521 | Pressure Switches | Company Product |
| 2522 | Pressure Tanks | Company Product |
| 2523 | Pressure Temperature Recorders | Company Product |
| 2524 | Pressure Test Pumps | Company Product |
| 2525 | Pressure Tested Silos | Company Product |
| 2526 | Pressure Testers | Company Product |
| 2527 | Pressure Transducer | Company Product |
| 2528 | Pressure Transducers | Company Product |
| 2529 | Pressure Transmitter | Company Product |
| 2530 | Pressure Transmitters | Company Product |
| 2531 | Pressure Vacuum Relief Valves | Company Product |
| 2532 | Pressure Vacuum Valves | Company Product |
| 2533 | Pressure Vacuum, Vernier Variators | Company Product |
| 2534 | Pressure Vessel | Company Product |
| 2535 | Pressure Vessel Steel | Company Product |
| 2536 | Pressure Vessel Tanks | Company Product |
| 2537 | Pressure Vessels | Company Product |
| 2538 | Pressure Washer | Company Product |
| 2539 | Pressure Washers | Company Product |
| 2540 | Pressure Washing Machines | Company Product |
| 2541 | Pressurized Hotwater Boilers | Company Product |
| 2542 | Prestar Casters | Company Product |
| 2543 | Prestar Castors | Company Product |
| 2544 | Prestress Concrete Piles | Company Product |
| 2545 | Prestressed | Company Product |
| 2546 | Prestressed Concrete | Company Product |
| 2547 | Prestressed Concrete Beams | Company Product |
| 2548 | Prestressing Equipment & Materials | Company Product |
| 2549 | Prestripper Vapour Scrubber | Company Product |
| 2550 | Prewater Treatment | Company Product |