long period seismograph [地震] 长周期地震仪

short period seismograph 短周期地震记录仪 ; 短周期地震仪

long-period seismograph 长周期地震仪

short-period seismograph [地震] 短周期地震仪

ultra long period seismograph 超长周期地震仪

middle-long period seismograph 中长周期地震仪

Medium-long period seismograph 中长周期地震仪

3-component long-period seismograph 三向长周期地震仪

observation with the long-period seismograph 长周期地震观测