并介绍施工中采用的ZY及超长结构不设缝工艺和复合塑料防水板工艺。
Two techniques during the construction are introduced including ZY over-long structure without joint and complex plastic sheet.
以聚乙烯塑料防水板为主要防水结构的复合式防排水系统是隧道防排水设计与施工的发展趋势。
It is a developing tendency to use polyethene plastic waterproof membrane as main structure in tunnel waterproof and water drainage.
有些人拿到了援助的帐篷，但是援助人员认为简单的塑料防水帐篷，可以从中间支起的，才是更合适的选择。
Some have been issued with tents. But relief workers reckon that simple plastic tarpaulins, suspended on poles, are a more durable option.
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