| 15 / | HD | BRUSHING, SCRUBBING, AND GENERAL CLEANING |
|
| 3 | DF | MACHINES {11} |
| 300.1 | DF | .~ With air blast or suction {26} |
| 415.1 |  | .~.~ Nozzle {7} |
| 416 | DF | .~.~.~> With plural mouths selectively usable, e.g., "duplex" nozzles {1} |
| 418 | DF | .~.~.~> With area adjusting, e.g., restrictors |
| 419 | DF | .~.~.~> With air flow control means, e.g., work-operated valve |
| 420 | DF | .~.~.~> With notched or grooved lips for localized intensification of air draft |
| 421 | DF | .~.~.~> With auxiliary inlet for ambient air, e.g., vacuum relief |
| 422 | DF | .~.~.~> With guard to inhibit work entry into nozzle mouth |
| 422.1 | DF | .~.~.~> Width changes along transverse dimension |