| 211 | Oil Drilling Chemicals | Company Product |
| 212 | Oil Drilling Contractors | Company Product |
| 213 | Oil Drilling Equipment | Company Product |
| 214 | Oil Exploration Companies | Company Product |
| 215 | Oil Exploration Equipment & Supplies | Company Product |
| 216 | Oil Extraction Machinery | Company Product |
| 217 | Oil Field Chemicals | Company Product |
| 218 | Oil Field Chokes | Company Product |
| 219 | Oil Field Equipment | Company Product |
| 220 | Oil Field Fishing Tools | Company Product |
| 221 | Oil Field Part Machining | Company Product |
| 222 | Oil Field Services | Company Product |
| 223 | Oil Filed Injection Pump | Company Product |
| 224 | Oil Filled Pressure Gauge | Company Product |
| 225 | Oil Filled Pressure Gauges | Company Product |
| 226 | Oil Filled Transformers | Company Product |
| 227 | Oil Filler | Company Product |
| 228 | Oil Filler Pipe | Company Product |
| 229 | Oil Filter Hose | Company Product |
| 230 | Oil Filter Housing Pipe | Company Product |
| 231 | Oil Filter Pipe | Company Product |
| 232 | Oil Filters | Company Product |
| 233 | Oil-fired Boilers | Company Product |
| 234 | Oil Flood Air Compressors | Company Product |
| 235 | Oil-Flooded Air Compressors | Company Product |
| 236 | Oil Flooded Compressors | Company Product |
| 237 | Oil-Flooded Screw Air Compressors | Company Product |
| 238 | Oil Flowmeters | Company Product |
| 239 | Oil Flushing Services | Company Product |
| 240 | Oil-Free | Company Product |