Aim: To probe the clinical value in the assessment of liver cirrhosis degree by arrival time of right portal vein with contrast-enhanced ultrasonography and velocity and flow volume with CDVP.
目的应用超声造影观察门静脉右支开始显影时间，以及彩色多普勒流速剖面技术检测门静脉右支血流速度和血流量，以探讨其在判断肝硬化程度中的临床价值。
How to determine the stability, flow value, how to choose an advisable void volume and what kind of mineral aggregate gradation is adopted are the key problems in Max ratio test.
如何准确测定稳定度和流值、如何选择合理的空隙率以及采用何种矿料级配是沥青混凝土配合比试验的关键问题。
How to determine the stability, flow value, how to choose an advisable void volume and what kind of mineral aggregate gradation is adopted are the key problems in Max ratio test.
如何准确测定稳定度和流值、如何选择合理的空隙率以及采用何种矿料级配是沥青混凝土配合比试验的关键问题。
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