198 / | HD | CONVEYORS: POWER-DRIVEN |
618 | DF | CONVEYOR SECTION {26} |
750.1 | DF | .~ Reciprocating conveying surface {7} |
773 | DF | .~.~ Including set of alternately-acting load-support members {2} |
777 | .~.~.~ Including transverse pivoted sets of alternately acting load-support members |