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