| 97290 | Rays, infrared, non-therapeutic treatment with | |
| 97290 | Rays, ultraviolet, non-therapeutic treatment with | |
| 42914 | Razor-blades, safety or straight | |
| 44816 | Razors, electric | |
| 42914 | Razors, non-electric (excl. surgical) | |
| 42914 | Razors, open blade | |
| 42914 | Razors, safety, non-electric (and their metal parts and blades) | |
| 42914 | Razors, safety, of plastics, presented with their blades | |
| 48150 | Razors, skin-grafting | |
| 43142 | Reaction turbines | |
| 37340 | Reaction vessels, of refractory ceramics | |
| 42310 | Reactors, boiling water | |
| 46122 | Reactors, current-limiting | |
| 46122 | Reactors, electric | |
| 42310 | Reactors, fast breeder | |
| 42310 | Reactors, gas-cooled | |
| 42310 | Reactors, isotope-producing | |
| 42310 | Reactors, nuclear | |
| 42310 | Reactors, nuclear, critical | |
| 42310 | Reactors, nuclear, electrical energy-producing | |
| 42310 | Reactors, nuclear, heterogeneous | |
| 42310 | Reactors, nuclear, homogeneous | |
| 87110 | Reactors, nuclear, maintenance and repair of boilers for | |
| 42310 | Reactors, nuclear, materials-testing | |
| 42310 | Reactors, nuclear, molten-salt | |
| 42310 | Reactors, nuclear, organic moderator-type | |
| 42310 | Reactors, nuclear, pressurized-water | |
| 42310 | Reactors, nuclear, sodium-graphite | |
| 42310 | Reactors, nuclear, subcritical | |
| 42310 | Reactors, propulsion, nuclear | |
| 42310 | Reactors, research, nuclear | |
| 42310 | Reactors, thermal, nuclear | |
| 47160 | Read only memories (ROMs) | |
| 73124 | Readers, magnetic, rental or leasing of, without operator | |
| 48330 | Readers, microfiche, whether or not capable of producing copies | |
| 48330 | Readers, microfilm, whether or not capable of producing copies | |
| 48330 | Readers, microform, whether or not capable of producing copies | |
| 73124 | Readers, optical, rental or leasing of, without operator | |
| 29290 | Reading covers, of leather, for books | |
| 85990 | Reading of electric meters | |