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METHOD FOR FILLING HEAT TUBES WITH MEDIUM OF DISSIPATION HEAT TRANSFER AND GAS CONVECTOR APPLYING SUCH HEAT TUBE, COMBINED GAS-HEATING APPLIANCE RESPECTIVELY GAS-FIRED HOT-AIR BLOWER
METHOD FOR FILLING HEAT TUBES WITH MEDIUM OF DISSIPATION HEAT TRANSFER AND GAS CONVECTOR APPLYING SUCH HEAT TUBE, COMBINED GAS-HEATING APPLIANCE RESPECTIVELY GAS-FIRED HOT-AIR BLOWER