The inter barrel with outsourcing, insulation layer is filled heat preservation material structure.
采用内筒体加外包，中间填充保温材料结构。
An unlocking door is arranged on the side wall of the upper chamber and the lower chamber is fully filled with heat absorbing and preservation materials.
上腔室的侧壁上设置有开启门；下腔室内充填满吸热保温材料。
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