When shake reach to some intensity in some direction, frequency and extent, people will have serious bad reaction.
当震动在一定方向和频率、幅度内达到一定强度时，会导致人体产生较严重的生理不良反应。
The pure quartz shake circuit with a high stable performance to the frequency.
全部采用石英振荡电路，具有极高的频率稳定性能。
The circumstances and headway in probe job of near technique around blast shake safety are given. The technical make use of control principle about frequency spectrum property.
重点介绍利用频谱特性控制原理的爆破震动安全新技术探索工作情况与进展。
The circumstances and headway in probe job of near technique around blast shake safety are given. The technical make use of control principle about frequency spectrum property.
重点介绍利用频谱特性控制原理的爆破震动安全新技术探索工作情况与进展。
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