The permeability constants of both liquid water and water vapour through eleven polymer films have been measured at three temperatures by weighing method.
本工作用重量法测量了水蒸气和液体水在十一种高聚物薄膜中的透过速率。
This European Standard covers the following product performance characteristics: reaction to fire, water vapour permeability, flexural strength, and thermal resistance.
此欧洲标准涵盖以下产品性能特点：防火性能，水蒸气渗透性、抗折强度和热阻。
This European Standard covers the following product performance characteristics: reaction to fire, water vapour permeability, flexural strength, and thermal resistance.
此欧洲标准涵盖以下产品性能特点：防火性能，水蒸气渗透性、抗折强度和热阻。
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