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room thermostat 
Mechanism that, by sensing changes in temperature, can be set to automatically switch the heating on or off in a room or house.
pointer
Metal needle attached to the thermometer showing the ambient temperature.
temperature control
Knob for selecting the desired temperature.
actual temperature
A built-in thermometer shows the current temperature of the room in which it is located.
desired temperature
Desired temperature of the ambient air.
cover
