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AUTOMATIC CHANGE-OVER SWITCH FOR SWITCHING FROM PUMP-ASSISTED FORCED FLOW OF A LIQUID TO GRAVITY-INDUCED FLOW, IN PARTICULAR FOR USE IN HEATING SYSTEMS EMPLOYING LIQUID PUMPED HEAT TRANSFER MEDIA
AUTOMATIC CHANGE-OVER SWITCH FOR SWITCHING FROM PUMP-ASSISTED FORCED FLOW OF A LIQUID TO GRAVITY-INDUCED FLOW, IN PARTICULAR FOR USE IN HEATING SYSTEMS EMPLOYING LIQUID PUMPED HEAT TRANSFER MEDIA
