这种保温瓶是用不锈钢制造的，保修期是20年。
The vacuum. flask is made of stainless steel which is aranteed for 20 years.
根据设计要求并结合三峡二期工程保温材料实际运用情况，通过一系列试验比选，最终选择聚苯板作为三峡工程三期大坝、厂房永久暴露面保温材料。
According to requirement of the project design and tests, EPS board is finally chosen as the thermal insulation material for the eternal exposed surface of Three Gorges project dam and powerhouse.
湿土套袋法采用外罩保温或降温材料（如黑塑料袋及反光膜袋等）可延长有效嫁接适期2个月左右；
An insulation or cooling materials used in wet soil bagging method (such as the black plastic bag and reflective film bag etc. ) can be extended by grafting appropriate period of 2 months;
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