| 摘要 |
A electric steam generating unit includes a housing having an upper end having a steam outlet and a lower end having a water inlet. An elongated tubular electric immersion heating element is vertically disposed in the housing in such a manner that an insulator space having a closed upper end is provided between the tubular element and housing. An elongated cylindrical rod-shaped electric immersion heating element is disposed coaxially within the tubular heating element and is so dimensioned that an elongated steam generating space of small volume subjected to the heat of both elements is formed therebetween.
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