| 421 | Reflector Lens | Company Product |
| 422 | Reflectors | Company Product |
| 423 | Reflex Gauges | Company Product |
| 424 | Reflex Level Gauges | Company Product |
| 425 | Reflex Lr Ultrasonic | Company Product |
| 426 | Reflex Pressure Vessels | Company Product |
| 427 | Reflex Tdr | Company Product |
| 428 | Refractometers | Company Product |
| 429 | Refractories | Company Product |
| 430 | Refractory | Company Product |
| 431 | Refractory Anchoring Systems | Company Product |
| 432 | Refractory Consultancy | Company Product |
| 433 | Refractory Fibre | Company Product |
| 434 | Refractory Linings | Company Product |
| 435 | Refractory Machines | Company Product |
| 436 | Refractory Materials | Company Product |
| 437 | Refractory Products | Company Product |
| 438 | Refractory Project Management | Company Product |
| 439 | Refractory Solutions | Company Product |
| 440 | Refresher Courses | Company Product |
| 441 | Refreshment Stands | Company Product |
| 442 | Refrigerant | Company Product |
| 443 | Refrigerant Air Dryers | Company Product |
| 444 | Refrigerant Gases | Company Product |
| 445 | Refrigerant Leakage Detectors | Company Product |
| 446 | Refrigerants | Company Product |
| 447 | Refrigerants Gas | Company Product |
| 448 | Refrigerated Air Dryers | Company Product |
| 449 | Refrigerated Cabinets | Company Product |
| 450 | Refrigerated Circulators | Company Product |