| 405 / | HD | HYDRAULIC AND EARTH ENGINEERING |
| 229 | DF | FOUNDATION {2} |
| 231 | DF | .~ Columnar structure (e.g., pier, pile) {7} |
| 232 | DF | .~.~ Process or apparatus for installing {5} |
| 233 | DF | .~.~.~ Casting in situ hardenable fluent material {7} |
| 240 | ![]() | .~.~.~.~ Dispensing fluent material while withdrawing dispenser {2} |
| 241 | DF | .~.~.~.~.~> Dispensing auger |
| 242 | DF | .~.~.~.~.~> Driven dispenser with separable tip |