210 / | HD | LIQUID PURIFICATION OR SEPARATION |
348 | DF | FILTER {25} |
473 | DF | .~ Resting on supporting receiver, e.g., portable {3} |
477 | .~.~ Resting on internal stop or surface {3} | |
478 | DF | .~.~.~> Unitary filter medium and radially expandable retainer |
479 | DF | .~.~.~> Inner separate retainer {1} |
481 | DF | .~.~.~> Longitudinal retainer or guide, (e.g., reflex coffee maker) |