The crystal and concrete combine into the closed water-prooflayer to block the erode of water flow and other liquids from all directions.
结晶体与混凝土结构结合成封闭的防水层整体，堵截来自任何方向的水流及其它液体侵蚀。
2
Said invention utilizes plastic film or plastic board as the water-prooflayer 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。
3
The paper introduced the construction technology of bituminous concrete paving coat, the materials choice of waterprooflayer.