| 86320 | Gas distribution services through mains (on a fee or contract basis) | |
| 54640 | Gas fitting installation services | |
| 54640 | Gas fittings, installation of | |
| 43911 | Gas liquefaction apparatus | |
| 48160 | Gas masks | |
| 69120 | Gas meters, maintenance of | |
| 85990 | Gas meters, reading of | |
| 33360 | Gas oil | |
| 44821 | Gas rings, of iron or steel, for domestic use | |
| 17200 | Gas, blast-furnace | |
| 17200 | Gas, city | |
| 17200 | Gas, coke oven | |
| 83510 | Gas, geochemical consulting services relating to the location of | |
| 83510 | Gas, geological consulting services relating to the location of | |
| 83510 | Gas, geophysical consulting services relating to the location of | |
| 91132 | Gas, natural, administrative services related to | |
| 65122 | Gas, natural, coastal water transportation of, in special tankers | |
| 12020 | Gas, natural, in the gaseous state | |
| 65222 | Gas, natural, inland water transportation of, in special tankers | |
| 86210 | Gas, natural, liquefaction of, for transportation | |
| 12020 | Gas, natural, liquefied | |
| 86210 | Gas, natural, regasification of, for transportation | |
| 65122 | Gas, natural, transoceanic water transportation o,f in special tankers | |
| 64222 | Gas, natural, transportation of, by railway in special tank cars | |
| 64332 | Gas, natural, transportation of, by road in special tank trucks | |
| 64410 | Gas, natural, transportation of, via pipeline | |
| 17200 | Gas, producer | |
| 83510 | Gas, scientific consulting services relating to the location of | |
| 48270 | Gas-concentration regulators | |
| 48265 | 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 | |