The paper introduced the construction technology of bituminous concrete paving coat, the materials choice of water proof layer.

介绍了沥青混凝土铺装层的施工技术，并对防水层材料的选择等技术也作了介绍。

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A utility model discloses a soft well dried net surface with big pores. The net surface comprises a layer of water-proof nonwoven whereon pluralities of big pores are distributed evenly.

本实用新型公开了一种大孔柔软干爽网面，该网面由一层拒水无纺布和在布面上制作出分布匀称的多个大孔构成。

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Said invention utilizes plastic film or plastic board as the water-proof layer of root, while the plastic layer is mounted on the surface of root or in the one layer of multilayer structure of root.

本发明用塑料薄膜或塑料板作为房顶的防水层，塑料层位于房顶表层，或位于房顶多层结构中的其中一层。

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