| 15 / | HD | BRUSHING, SCRUBBING, AND GENERAL CLEANING |
| 3 | DF | MACHINES {11} |
| 300.1 | DF | .~ With air blast or suction {26} |
| 301 | DF | .~.~ Fixed position cleaners or installed cleaning systems {6} |
| 303 | DF | .~.~.~ With work handling or supporting {4} |
| 310 | DF | .~.~.~.~ Manual application of work to cleaning means {1} |
| 311 | | .~.~.~.~.~ With moving work-agitating means |