Heat exchanger for electric heating of water - using concave water conductors and convex heating element surfaces held under pressure to maintain good contact during heating
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Continuous flow water heater
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Steam iron
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Evaporator type air humidifier - has inter changeable sheet metal trough to act as evaporator container mounted on heating element
DE2530927A1
Water heater with protected heating element - has thin sheet metal surround completely enclosing elements and disposable when furred up
DE2431427A1
Water supply unit for households and industrial processing - has float valve with ball closure for preventing overflow
