| 181 | Gas Measuring Instruments | Company Product |
| 182 | Gas Metal (MIG/MAG) Arc Welding Equipment | Company Product |
| 183 | Gas Meters | Company Product |
| 184 | Gas Mixers | Company Product |
| 185 | Gas Monitor | Company Product |
| 186 | Gas Monitoring Transmitters | Company Product |
| 187 | Gas Monitors | Company Product |
| 188 | Gas Nozzles | Company Product |
| 189 | Gas Oxygen | Company Product |
| 190 | Gas Pipe Contractors | Company Product |
| 191 | Gas Piping Works | Company Product |
| 192 | Gas Pumps | Company Product |
| 193 | Gas Purifier Packings | Company Product |
| 194 | Gas Regulators | Company Product |
| 195 | Gas Sample Dryers | Company Product |
| 196 | Gas Samplers | Company Product |
| 197 | Gas Sampling Systems | Company Product |
| 198 | Gas Saver | Company Product |
| 199 | Gas Saving | Company Product |
| 200 | Gas Saving Equipment | Company Product |
| 201 | Gas Scrubbers | Company Product |
| 202 | Gas Sensitive | Company Product |
| 203 | Gas Sensor | Company Product |
| 204 | Gas Spring | Company Product |
| 205 | Gas Springs | Company Product |
| 206 | Gas Storage Tanks | Company Product |
| 207 | Gas Supply Manifolds | Company Product |
| 208 | Gas Temperature Transmitters | Company Product |
| 209 | Gas Torch | Company Product |
| 210 | Gas Transmitters | Company Product |