电磁式地震计; 电磁式地震仪;电磁地震仪

seismograph electromagnetic Benioff seismograph electrodynamic seismograph Galitzin seismograph horizontal component seismograph critically damped seismograph electromagnetic resolver electromagnetic transmitter electromagnetic pickup electromagnetic valve moving-conductor electromagnetic seismograph seismograph amplifier seismograph station moon seismograph vertical seismograph shock seismograph standard seismograph pendulum seismograph torsion seismograph