| 744.79 | Runways, horizontal roller-type | |
| 663.7 | Runways, of refractory ceramics (incl. those in the form of half-cylinders) | |
| 899.63 | Rupture appliances, orthopaedic | |
| 874.53 | Rupture resistance-testing machines for textiles | |
| 724.41 | Rupturing machines for producing ruptured filament tow | |
| 661.82 | Rushes agglomerated with mineral binders in panels, boards, tiles, blocks, etc. | |
| 292.39 | Rushes, unworked or simply prepared | |
| 048.41 | Rusks | |
| 597.25 | Rust preventatives for lubricating oils | |
| 597.29 | Rust preventatives for other liquids used for the same purposes as mineral oils | |
| 081.13 | Rutabagas | |
| 681.24 | Ruthenium alloys (containing 2% or more by weight of ruthenium; excl. ruthenium isotopes and ruthenium-platinum alloys in which ruthenium does not predominate by weight), unwrought | |
| 681.25 | Ruthenium alloys (containing 2% or more by weight of ruthenium; excl. ruthenium isotopes) in semi-manufactured forms (excl. blanks of articles) | |
| 524.32 | Ruthenium ammino complexes | |
| 524.32 | Ruthenium dioxide | |
| 524.32 | Ruthenium double nitrites | |
| 681.25 | Ruthenium in semi-manufactured forms (excl. blanks of articles) | |
| 524.32 | Ruthenium nitroso complexes | |
| 524.32 | Ruthenium tetrachloride | |
| 524.32 | Ruthenium tetraoxide | |
| 524.32 | Ruthenium trichloride | |
| 524.32 | Ruthenium, colloidal | |
| 681.24 | Ruthenium, unwrought | |
| 681.22 | Ruthenium-clad base metals, not further worked than semi-manufactured (excl. blanks of articles) | |
| 681.24 | Ruthenium-platinum alloys (ruthenium predominating by weight), unwrought | |
| 287.83 | Rutile | |
| 541.61 | Rutin | |
| 541.61 | Rutoside | |
| 542.32 | Rye ergot alkaloids and their derivatives, and salts thereof, put up as medicaments, not containing hormones (or their derivatives) or antibiotics (or their derivatives), in measured doses or in forms or packings for retail sale | |
| 542.31 | Rye ergot alkaloids and their derivatives, and salts thereof, put up as medicaments, not containing hormones (or their derivatives) or antibiotics (or their derivatives), not in measured doses or in forms or packings for retail sale | |
| 045.1 | Rye, denatured | |
| 048.14 | Rye, hulled, whether or not sliced or kibbled | |
| 048.14 | Rye, kibbled | |
| 048.14 | Rye, pearled | |
| 071.33 | Rye, roasted as a coffee substitute | |
| 048.13 | Rye, rolled or flaked (excl. prepared breakfast foods) | |
| 045.1 | Rye, seed | |
| 045.1 | Rye, unmilled | |