My discovery will be more fully understood from the following description and drawings, where Fig. 1 is a diagram showing the generalarrangement of the apparatus as usually employed.
我发现从以下描述和图纸将会更被彻底的理解，在图1中是一个通常采用显示装置的总体布置图。
2
The pick-up arrangement, mathematical model of impact-point positioning, medium for the transmission of earthquake waves, and the general system block-diagram etc. are described.