15 / | HD | BRUSHING, SCRUBBING, AND GENERAL CLEANING |
3 | DF | MACHINES {11} |
300.1 | DF | .~ With air blast or suction {26} |
347 | DF | .~.~ With dust or dirt handling or storing or separating, e.g., filter bags {5} |
352 | .~.~.~ Separator element cleaning in situ and/or storage or removal of retained dirt |