| 摘要 |
<p>An improved electric heating system for removable application to the bottoms of stock watering tanks. It consists of a substantially rigid heater element connected in series with surface thermostat, for energization from a suitable electrical source. The element is forced into heat transfer relation with the outside of the bottom of said tank, and is rigidly connected to a thermostat bracket which simultaneously provides good heat transfer from the tank to the thermostat.</p> |
