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 |