| 126 / | HD | STOVES AND FURNACES |
| * | DD | HEATERS {7} |
| 263.01 | DF | .~ Chemical {3} |
| 263.05 | DF | .~.~ Liquid in contact with solid (e.g., water and lime) {1} |
| 263.06 | | .~.~.~ Including separate solid and liquid compartments {3} |
| 263.07 | DF | .~.~.~.~> Flexible wall compartment (e.g., flexible plastic bag) {1} |
| 263.09 | DF | .~.~.~.~> Including means to rupture or open solid or liquid compartment |
| 263.1 | DF | .~.~.~.~> Including time release coating on solid in contact with liquid |