| 83411 | Gas, scientific consulting services relating to the location of | |
| 48269 | Gas-concentration regulators | |
| 62391 | Gaseous fuels and related products, mail order retail trade services of | |
| 62191 | Gaseous fuels and related products, non-specialized store retail trade services of | |
| 62491 | Gaseous fuels and related products, other non-store retail trade services of | |
| 62591 | Gaseous fuels and related products, retail trade services of, on a fee or contract basis | |
| 62291 | Gaseous fuels and related products, specialized store retail trade services of | |
| 61191 | Gaseous fuels and related products, wholesale trade services of, except on a fee or contract basis | |
| 61291 | Gaseous fuels and related products, wholesale trade services of, on a fee or contract basis | |
| 69120 | Gaseous fuels, distribution of through mains | |
| 65222 | Gases, bulk, inland water transportation of, in special tankers | |
| 67220 | Gases, bulk, storage of | |
| 65122 | Gases, bulk, transportation of, by railway in special tank cars | |
| 65112 | Gases, bulk, transportation of, by road in special tank trucks | |
| 67220 | Gases, bulk, warehousing of | |
| 34210 | Gases, inert (excl. radioactive) | |
| 33420 | Gases, petroleum, natural, in the gaseous state (excl. separate chemically defined gases in the pure or commercially pure state) | |
| 33420 | Gases, petroleum, natural, liquefied (excl. butane, propane, and separate chemically defined gases in the pure or commercially pure state) | |
| 34210 | Gases, rare (excl. radioactive) | |
| 33420 | Gases, refinery, in the gaseous state (excl. separate chemically defined gases in the pure or commercially pure state) | |
| 33420 | Gases, refinery, liquefied (excl. butane, propane, and separate chemically defined gases in the pure or commercially pure state) | |
| 43924 | Gaskets and similar joints, assortments or sets, of any materials dissimilar in composition, put up in pouches, envelopes, boxes, etc. | |
| 88769 | Gaskets and similar joints, made from metal, manufacturing services | |
| 43924 | Gaskets of laminated metal foil | |
| 43924 | Gaskets of metal sheeting combined with other material (e.g., asbestos, felt, paperboard) | |
| 27998 | Gaskets of textile fabric | |
| 37920 | Gaskets, asbestos (excl. those of subclass 43924) | |
| 29290 | Gaskets, leather | |
| 31922 | Gaskets, of agglomerated cork (excl. those included in sets of subclass 43924) | |
| 31922 | Gaskets, of natural cork (excl. those of subclass 43924) | |
| 32199 | Gaskets, of paper or paperboard | |
| 36270 | Gaskets, of unhardened non-cellular vulcanized rubber | |
| 88412 | Gasoline manufacturing services | |
| 33310 | Gasoline, aviation | |
| 33310 | Gasoline, motor | |
| 33310 | Gasoline, natural | |
| 48150 | Gastroscopes | |
| 36950 | Gates and similar barriers, of plastics | |
| 46929 | Gates, level-crossing, electrically-powered operating equipment for | |
| 42190 | Gates, level-crossing, of aluminium | |