| 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} |
| 566 | ![]() | .~.~ Plural power-driven sections {1} |
| 567 | DF | .~.~.~> Serially arranged |