The grade index is different objectively, and grade index has great correlation with arable land quality, which is premise of Grade-Determination of arable land.
客观上这种等级指数存在着一定的差异，并且这种功级指数同耕地质量之间的差异有很人的相关性，这是对耕地进行分等定级前提。
The determination of the rational highway grade structure is one part of highway network planning, it also is an important content of highway network layout optimization.
公路网合理等级结构的确定，是公路网规划的组成内容之一，也是公路网布局优化的重要组成内容之一。
The table relates sheathing thickness, nail size and spacing, sheathing grade and allowable unit shear to enable determination of an appropriate construction configuration.
表中涉及覆板厚度，钉的大小和间距，覆板等级和允许单位剪切，来确定适当的施工构造。
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