| 摘要 |
<p>A baseplate assembly for an impulsive, vehicle-transported seismic wave generator for use on rocky, irregular earth sufaces is comprised of a small diameter, earth-contacting, freely movable target member which is laterally confined in the center of a surrounding wide area frame adapted to support vehicle weight directly against the earth. Such a target member may safely be subjected to high dynamic loading per unit area responsive to the impact of a descending mass.</p> |
