| 摘要 |
A thermal control for a liquid heating vessel comprises a lever (7) pivotable from an off position (Fig. 4), in which heating is switched off, to either of a boil position (Fig. 5) in which heating is switched on until the liquid reaches boiling temperature, and a sub-boil position (Fig. 6) in which heating is switched on until the liquid reaches a sub-boiling temperature. |
