1) diameter class
径级
1.
The 70-year restored community and primary forest had the similar species richness and abundance distribution in different diameter classes and height classes.
恢复70年的群落与原始林中的物种丰富度及多度随径级和高度级的分布形式相同,但恢复20年和30年的群落则与原始林不同,并且缺少大径级和较高的树木。
2.
The TLRF had the highest total biomass in the big diameter classes(>5th diameter class),the TMF had the highest total biomass in the first diameter classes,however,no significant difference was found in the second,the third and the fourth diameter classes in the total biomass among the three low elevational tropical forests.
总生物量在胸径≥40 cm径级内热带低地雨林最高,1~10 cm径级内热带季雨林最高,10~40 cm径级内3种群落无显著差异。
2) grain size fractionation
粒径分级
1.
The grain size fractionation characteristics of heavy metals are similar to those of mass fraction,i.
1%;重金属含量的粒径分级特性和质量分数相似,即粒径越细的部分重金属含量越高;Pb,Zn,Cu,Cr之间的相关系数较高;重金属的浸出浓度在不同的功能区基本遵循同样的规律,即细粒部分重金属浸出浓度最高,随粒径的增大浸出浓度逐减,细粒部分重金属的浸出浓度:w(Pb)为59。
3) stepless variable radius
无级变径
1.
Discussion on design of stepless variable radius chuck;
对无级变径卡盘设计思路的探讨
4) size distribution
粒径级配
1.
The relationships among preparation parameters,including density of the green body and the size distribution of the raw materials,microstructure and the properties of the materials were revealed.
采用氮化硅作为碳化硅材料的结合相的方法制备氮化硅结合碳化硅耐火材料 ,通过对氮化硅结合碳化硅的生坯制备过程的探讨 ,分析了生坯密度、原料粒径级配及制备过程各工艺参数之间的关系 。
2.
The size distributions of eroded sediment,deposit and suspended sediment in the basin .
在此基础上,通过流域侵蚀、沉积物和悬移质泥沙粒径级配的对比分析,计算得出每年从长江上游侵蚀下来的泥沙中,粒径大于0。
5) cut size
分级粒径
1.
The optimal operation of NHF-Ⅱ air clsssifier has been discussed by using orthogonal experiment, and the relstion between various fsctors and the cut size as well as the P8rtial classification efficiency have been analysed by means of regressive method.
运用正交试验方法，探求了ＮＨＦ－Ⅱ型分级机的最佳操作参数，并对分级粒径及部分分级效率与影响因素的关系进行了回归分析，该研究对分级机的工业化生产调试，具有一定的指导意义，为离心转子式分级机的设计提供了必要的依据。
6) grain size class
粒径级
补充资料：径径
1.不停貌。
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