finned tubing, heating units and/or cooling units for heating and/or cooling the interior of enclosures, such as rooms or the like, baseboard heating units, vapor condensers, water heaters of the coil type, boiler burners (oil or gas fired), control valves for heating systems, and refrigerant heat exchangers

'and/or':5,10 'baseboard':22 'boiler':33 'burner':34 'coil':31 'condens':26 'control':39 'cool':6,11 'enclosur':15 'exchang':47 'fin':1 'fire':38 'gas':37 'heat':3,9,23,42,46 'heater':28 'interior':13 'like':21 'oil':35 'refriger':45 'room':18 'system':43 'tube':2 'type':32 'unit':4,7,24 'valv':40 'vapor':25 'water':27

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