392 / | HD | ELECTRIC RESISTANCE HEATING DEVICES |
* | DD | HEATING DEVICES (CLASS 219 SUBCLASS 200) {11} |
311 | DF | .~ Fluid-in-circuit type heater {6} |
324 | DF | .~.~ Steam or vapor generator {2} |
333 | DF | .~.~.~ Manually filled tank or container {3} |
336 | .~.~.~.~ Separate electrode compartment {1} | |
337 | DF | .~.~.~.~.~> Electrode compartment removable from tank |