The existing heat preservation cap is in the square or rectangular shape, the radiating area is large, and the thermal insulation and heat preservation effect is not good.
目前使用的保温帽都是方形或矩形的，散热面积大，绝热保温效果差。
The existing heat preservation cap is in the square or rectangular shape, the radiating area is large, and the thermal insulation and heat preservation effect is not good.
目前使用的保温帽都是方形或矩形的，散热面积大，绝热保温效果差。
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