· The DSHK-Ⅱ 72-Channel overlay switch, fitting-in our seismograph ,is applied to the methods of the refraction or reflection exploration and surface wave survey. The procedure of seismic data acquisition can be simplified by virtue of the switch for field operation.
· 72 channels input, 48 channels output
· Mechanical touch, anti-interference and background noise.
· Gold plating contact, good contact
· Easy in operation and safe
