The effective elastic thickness of continent can correspond to only a part of the lithosphere, not to the total lithosphere.
大陆岩石圈等效弹性厚度往往只与岩石圈内部的某些岩层相关，因此它可能不代表一般意义上的岩石圈厚度。
The elastic wave reflection method is one of the effective methods of detecting the thickness of the top coal seam.
声波反射法是目前顶煤厚度探测的有效方法之一。
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