With analyzing and generalizing the change law of vent speed of air hole and quantity of vent when pore diameter change under the same contraction ratio.
通过对同一收缩比下通气孔直径变化时通气孔风速及通风量的变化规律的分析总结，得出实际通气孔直径最优设计尺寸应为d0=1.35m。
参考来源 - 竖井溢洪道体型优化试验研究·2,447,543篇论文数据，部分数据来源于NoteExpress
With a product line of tens of categories, we can offer quick copying with precise contraction ratio (up to two thousandth) for mold making.
公司产品品种达几十种，为你的模具制作提供快速的复制，精密的收缩率，产品的收缩率可以达到千分之二。
Moving cowl, decreasing interior contraction ratio also can realize the hypersonic sidewall compression inlet's self-starting because of separation bubble on sidewall spilling out.
移动唇口板以减小内收缩比可以实现侧压式进气道自起动，主要是因为侧板分离包被排出进气道。
Nevertheless, study on various contraction functional status and left ventricular diastolic function at the time of E/A ratio pseudonormalized phenomena is scarce.
但对不同收缩功能状态及E/A比值假性正常化时的左室舒张功能的研究少见有报道。
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