Assertion: electric heater's thermostat | /r/CapableOf | use a bi-metallic strip
Facets:
value: as the temperature changes
type: TEMPORAL
Source sentences:
text: Mechanical thermostats use a bi-metallic strip – two different metals laminated together with different rates of thermal expansion – as the temperature changes, the strip will bend or straighten, opening or closing a circuit and switching the heater on or off.