| 198 / | HD | CONVEYORS: POWER-DRIVEN |
| 570 | DF | CONVEYING SYSTEM HAVING PLURAL POWER-DRIVEN CONVEYING SECTIONS {18} |
| 586 | DF | .~ With relatively adjustable sections {3} |
| 592 | ![]() | .~.~ By means mounting a section to swing about a generally horizontal axis {1} |
| 593 | DF | .~.~.~> With flexible means and winding drum |