下古生界气藏很可能形成于喜山期，其扩散损失量较小；
The gas pool of Lower Paleozoic is probably formed in Himalayans period.
通过改进傅立叶有限差分的延拓算子，补偿了几何扩散损失引起的振幅误差。
We improved FFD extrapolation operator to compensate the amplitude difference generated by geometry diffusion loss.
利用理论计算方法以及FLUENT软件对轴流通风机扩散筒的扩散损失进行了研究。
The research on diffusion loss of axial-flow fan's diffuser is carried out using theory calculation method and FLUENT software.
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