| 181 | Gas & Oil Engineers | Company Product |
| 182 | Gas & Oil Separators | Company Product |
| 183 | Gas & Oil Well Screens | Company Product |
| 184 | Gas Oxygen | Company Product |
| 185 | Gas Pipe Contractors | Company Product |
| 186 | Gas Piping Works | Company Product |
| 187 | Gas Pumps | Company Product |
| 188 | Gas Purifier Packings | Company Product |
| 189 | Gas Regulators | Company Product |
| 190 | Gas Sample Dryers | Company Product |
| 191 | Gas Samplers | Company Product |
| 192 | Gas Sampling Systems | Company Product |
| 193 | Gas Saver | Company Product |
| 194 | Gas Saving | Company Product |
| 195 | Gas Saving Equipment | Company Product |
| 196 | Gas Scrubbers | Company Product |
| 197 | Gas Sensitive | Company Product |
| 198 | Gas Sensor | Company Product |
| 199 | Gas Spring | Company Product |
| 200 | Gas Springs | Company Product |
| 201 | Gas Storage Tanks | Company Product |
| 202 | Gas Supply Manifolds | Company Product |
| 203 | Gas Temperature Transmitters | Company Product |
| 204 | Gas Torch | Company Product |
| 205 | Gas Transmitters | Company Product |
| 206 | Gas Trial | Company Product |
| 207 | Gas Tungsten (TIG) Arc Welding Equipment | Company Product |
| 208 | Gas Turbine Generating Sets | Company Product |
| 209 | Gas Turbines | Company Product |
| 210 | Gas Validation | Company Product |