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} |
341.08 | DF | .~.~ Conveyor responsive to station operation {1} |
341.09 | .~.~.~ Speed control |