| 507 / | HD | EARTH BORING, WELL TREATING, AND OIL FIELD CHEMISTRY |
| 200 | DF | WELL TREATING {4} |
| 203 | DF | .~ Contains organic component {17} |
| 265 | ![]() | .~.~ Organic component is a fat, fatty alcohol, fatty oil, ester-type wax, fatty still residue, or higher fatty acid or salt thereof |