读取此属性将返回当前垂直偏移。

Reading this property returns the current vertical offset.

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设置此属性会导致文本编辑控件滚动到指定的垂直偏移。

Setting this property causes the text editing control to scroll to the specified vertical offset.

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对于层状介质，油藏变化前后的地震波传播路经比较复杂，其激发点和接受点发生了变化，要想用叠前远偏移距数据直接计算垂直时差比较困难。

But to layered strata, the seismic wave path is complicated when reservoir changes, and it is difficult to directly define vertical time difference by pre stack far offset seismic data.

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