deep surface meaning in Chinese

深面

Secondly , according to the theory of impact echo method examining flaws , the road surface and the bridge surface are aimed as study targets , four concrete plates are made with differently deep surface - opening cracks . using the experimental system of impact echo method made by sansalone etc . , this paper measures the stress waves velocity conveying in concrete plates by using one transducer or two transducers , and measures the depth of surface - opening cracks in concrete plates by using two transducers , and then the important data are attained
接着，根据冲击反射法检测结构物缺陷的原理，以路面和桥面的开口裂纹为研究对象，制作了带有不同深度开口裂纹的混凝土板块，使用sansalone等人开发的冲击反射法实验系统，用单传感器和双传感器分别对混凝土板块内应力波传播的速度和不同深度的开口裂纹进行了测量，得到了重要的实验数据。