<delect id="y4fcz"><button id="y4fcz"></button></delect>
<strong id="y4fcz"><i id="y4fcz"><pre id="y4fcz"></pre></i></strong>


Service time

24 Hours Service

Write to us



Contact Us+8618653298567

Drainage function of curb stone

May 01, 2019

The upper layer of curbstone is made of ordinary concrete, and its impermeability can prevent the pavement rainwater from being poured into the pavement structure, and at the same time, the surface layer has a strong structural strength; the lower layer is made of porous concrete to form a water-permeable layer, which allows water in the pavement structure to pass through The permeable layer is smoothly discharged (usually the same cross section of the road, the road is higher than both sides, and the water inside the pavement structure flows to both sides under the action of gravity, and the porous concrete layer that enters the edge stone is discharged when it reaches the edge of the road).

Related News


DZ五月丁香色综合久久4438是手机电影网,在线观看久久婷婷综合色丁香五月 狠狠噜狠狠狠狠丁香五月免费影片视频在线,五月丁香色综合久久4438在线视频网有着精品高清视频,免费在线播放!用户可以感受到堪称极致的体验!