| 摘要 |
In order to locate underground lines such as, for example, plastic water pipes, a geophone, a hydrophone in the case of a line conducting water, is connected to the line, and the surface of the earth in the region of the suspected line is set vibrating at various points successively by means of an oscillator, and the vibrations transmitted thereby to the line are detected by the geophone and the respective maximum values serve to determine the location of the line. <IMAGE>
|
