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对于同一个自振 周期而言，位移、速度、加速度是等比例缩放的，所以我们可以把这三个反应谱画在同一张 图形里
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owner: bian222 - (no access) - 地震力是怎么算出来的111.pdf, p46


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statusnot read reprioritisations
last reprioritisation on suggested re-reading day
started reading on finished reading on

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