198 / | HD | CONVEYORS: POWER-DRIVEN |
523 | DF | CONVEYOR SYSTEM HAVING A GRAVITY CONVEYOR SECTION {11} |
550.01 | DF | .~ Bin having a power-driven conveyor section for discharging or feeding discharge to a gravity or power-driven section {8} |
550.5 | DF | .~.~ Power-driven discharge means feeds to a subsequent power-driven section {4} |
550.8 | .~.~.~ Of the scraper type |