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1)  size grades
粒度级
1.
The results show that the levels of the total sulfur and pyritic sulfur vary little in different size grades of coal,but in a same size grade the sulfur content increases with the density grades.
通过对云南省东北部昭通市镇雄干沟乡荣兴煤矿C5煤层原煤筛分浮沉实验的研究,分析了该煤层中全硫及形态硫在不同粒度级和密度级中的分布规律。
2)  Particle gradation
粒度级配
1.
In the paper,the development in preparing ultrafine explosive at home and abroad is comprehensively analyzed,and a disquisitive content was set up by consulting the domestic and overseas correlative datum,that is NTO ultrafine and particle gradation with using supercritical CO2 anti-solvent.
本文的具体方案主要有两部分,即用GAS法超细化NTO及其粒度级配。
2.
The present development of the explosive of thinning and particle gradation both hereand abroad is summarized in the paper.
本论文综述了目前国内外关于炸药细化技术及粒度级配的研究进展。
3)  size classification
粒度分级
1.
Preparation and Size Classification of Alumina Series Abrasive Particles for Chemical Mechanical Polishing;
氧化铝系磨料的粒度分级主要是针对粒度范围在0。
4)  classification size
分级粒度
5)  grain graduation
粒度级配
1.
In order to guarantee that the products of spinelbased inert anode possess high volume density and low porosity, based on the theory of ball arrangement and started with grain composition of the raw material, the grain graduation of spinel was studied experimentally.
实验中根据不同的产品规格,设定了4种不同的主颗粒,通过测量振实密度以寻求最佳的粒度级配。
6)  size-fractionated
粒度分级
1.
The size-fractionated chlorophyll a concentration was surveyed in the subtropical circle area of the northwest Pacific Ocean, which is in the area east of Ryukyu Islands chain, Taiwan Island and Luzon Island (15°00′~27°40′N, 121°30′~131°00′E) during the autumn 2002.
粒度分级结果表明,Pico级份的光合浮游生物占绝对优势(86%),Nano级份次之(11%),大细胞的Net级份所占比例最小(3%),呈现出微微型光合浮游生物在寡营养海区居重要地位的状况。
补充资料:粒度级配
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性质:又称(粒度)级配。由不同粒度组成的散状物料中各级粒度所占的数量。常以占总量的百分数来表示。由不间断的各级粒度所组成的称连续级配;只由某几级粒度所组成的称间断级配。合理的颗粒级配是使配料获得低气孔率的重要途径。在耐火材料的生产中根据原料特性、工艺条件和产品性能来确定合理的颗粒级配。具有合理颗粒级配的泥料,既有利于成形,也有利于坯体的烧结,并可获得密度较高的制品。对于密度和气孔率等要求不同的耐火制品,可通过调整颗粒级配的方法而获得。当物料破碎后,只控制临界粒度,不再对其进行粒度分级,也不再调整其粒度组成时,称自然粒度。

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