main shock [地震] 主震
main shock strut 主起落架 ; 主起落架减震支柱
main shock-after shock type 主震余震型
Main shock or Principal shock 主震或本震
main shock-aftershock type 主震余震型
Chi-Chi main shock 集集主震
main shock type 主震型
main shock type swarm 主震型震群
Their house, which was solidly built, resisted the main shock.
他们的房子修建得很坚固，经受住了主震。
Using accelerations measured in the lower inspection gallery from the main shock as well as aftershocks, the natural periods of vibration were 0.84, 0.96, 0.92, and 0.87 seconds.
在低位测量站的加速器测量了主震以及余震，正常振幅为0.84、0.96、0.92和0.87。
It can happen with a month, or within days, from the main shock.
余震可以在主震发生后的一个月或者几天之内发生。
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