| 422 / | HD | CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING |
| 919 | DD | BURETTES; PIPETTES [B01L 3/02] {5} |
| 922 | DD | .~ Pipettes, i.e., with only one conduit for withdrawing and redistributing liquids [B01L 3/02C] {1} |
| 923 | DD | .~.~ Plunger pump type [B01L 3/02C3] {6} |
| 925 | | .~.~.~ Having mechanical strokelength setting means, e.g., movable stops [B01L 3/02C3D] |