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G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
G05D23/00—Control of temperature
G05D23/01—Control of temperature without auxiliary power
G05D23/02—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature
G05D23/08—Control of temperature without auxiliary power with sensing element expanding and contracting in response to changes of temperature with bimetallic element