Floating cover function: it mainly possess three item of function as accumulate biogas, biogas storage, pressure adjustment.
浮罩的功能：聚集沼气、沼气储存、压力调整三项主要特性。
The article introduces principle of design and construction of HDPE film floating cover for sewage sink, construction of the cover, material selection as well as key points of its installation.
介绍了采用HDPE膜做污水池浮动盖的设计和施工原则，浮动盖的构成、材料选用和施工安装要点等。
Floating clouds cover the sun.
浮云蔽日。
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