The internal and external pot body is spherical form of pot body double structure, intermediate sandwich ventilation with steam heating.
锅体是由内外球形锅体形成的双层结构方式，中间夹层通入蒸汽加热。
The internal and external pot body is spherical form of pot body double structure, intermediate sandwich ventilation with steam heating.
锅体是由内外球形锅体形成的双层结构方式，中间夹层通入蒸汽加热。
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