Can also be a period of time in the sun insolates, assuming that some have yellow, pervious to light, and there are even atomization, then this must be poor quality.
还可以在阳光下暴晒一段时间，假定有些有发黄，透光不佳，甚至有雾化，那么这一定也是质量比较差的。
For deep and pervious soil foundation under earth-rockfill dam, a concrete diaphragm wall must be provided to control seepage.
建造在透水的深覆盖层上的土石坝，坝基常设有混凝土防渗墙，如何正确地确定防渗墙的应力是坝工设计的难点。
For deep and pervious soil foundation under earth-rockfill dam, a concrete diaphragm wall must be provided to control seepage.
建造在透水的深覆盖层上的土石坝，坝基常设有混凝土防渗墙，如何正确地确定防渗墙的应力是坝工设计的难点。
应用推荐