| 37 / | HD | EXCAVATING |
| 307 | DF | BENEATH A BODY OF WATER (E.G., DREDGER) {11} |
| 317 | DF | .~ Suction {8} |
| 324 | ![]() | .~.~ Including driven digger adjacent suction inlet (e.g., cutterhead dredger) {3} |
| 325 | DF | .~.~.~> With specific bearing, or means to lubricate or seal |
| 326 | DF | .~.~.~> Rotary {4} |
| 332 | DF | .~.~.~> Endless |