... ,shear wave measurement. DZQ6B Engineering Seismograph (Surface Wave Instrument) Realization of Various Seismic Methods; Surface wave, high-density seismic ... safety evaluation, pile foundation testing, etc.Working system based on Chinese Windows environment, powerful in functions, easy for operation.High dynamic ... : 390×270×190mmWeight: 9kg DZQ6B Engineering Seismograph (Surface Wave Instrument)