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 |