198 / | HD | CONVEYORS: POWER-DRIVEN |
523 | DF | CONVEYOR SYSTEM HAVING A GRAVITY CONVEYOR SECTION {11} |
562 | DF | .~ Gravity conveyor section is gravity flow path feeding to power-driven section {4} |
563 | .~.~ Followed by gravity section (i.e., gravity discharge material holder, or gravity flow path) |