ratio of first-grade products 一级品率
ratio o of grade 锯材等级比率
ratio of mid-high grade leaves 优质烟叶中上等烟比例
Recently, it has been proven that the casting technology is advanced because the slab grinding ratio of grade 304 is on the same level at the reference plant.
目前，以304钢种为代表的板坯修磨率达到了样板厂水平，板坯表面质量达到了设计要求，工艺设计被证明是合理的。
Continuously readjusting the grade limit value(classical domain and joint domain) of every factor can maximize the ratio of historical runoff to actual runoff production in a drainage basin.
通过反复调整各因子的等级分界值（经典域和节域），可以使流域产流计算等级和实际等级的拟合率达到最大，其结果比较好。
It shows the axial tension initial cracking strength of concrete increases with the increasing of steel fiber volume ratio and enhancing of concrete strength grade separately.
结果表明：混凝土轴拉初裂强度分别随钢纤维体积率的增大和混凝土强度等级的提高而增大。
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