通过大量的现场试验，得出三牙轮钻头三喷嘴优化组合的经验比值。
The experiential ratio of optimum combination of three nozzles on tri cone bit is obtained based on many field experiments.
含粉煤灰-硅灰或矿渣-硅灰的不同组合的混凝土的劈拉强度与抗压强度的比值为0．063～0．066。
The ratio of split tensile strength to compressive strength of concretes containing different combinations of FA and SF or GBS and SF were 0.063 to 0066.
本研究共采集岩心样品1003个，发现介形类化石557个，鉴定出15个化石组合带，测得252组碳氧同位素和189组微量元素比值数据。
In this study, 1003 core samples were collected, found 557 fossils of ostracods, identified the 15 fossil assemblage, the measured carbon and oxygen isotopes 252, and 189 trace element ratio data.
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