| 198 / | HD | CONVEYORS: POWER-DRIVEN |
| 339.1 | DF | WITH MEANS TO FACILITATE WORKING, TREATING, OR INSPECTING CONVEYED LOAD AT A STATION {8} |
| 341.01 | DF | .~ Condition responsive control of conveyor or station apparatus {3} |
| 341.03 | DF | .~.~ Station operation responsive to presence or absence of item {4} |
| 341.06 | | .~.~.~ Quantity of items |