Practices have proved that the upper injection pressure limit, determined with pseudopaisson's ratio method, based on passive microseismogram is suitable for oilfield development.

实践表明，以无源微地震测试结果为基础的拟泊松比法确定的注水压力上限能够较好地适应油田开发的需要。

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Which is still a good 20 percentage points above the ratio considered the upper limit for what would allow private sector and economy to thrive.

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Under the Obama plan there is no upper limit on this loan-to-value ratio.

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