采用分形理论研究分级尾砂的级配。
Gradation of classifying tailings was researched with fractal theory.
马来西亚早在1997年就禁止砂的出口。
最后，分析了钙质砂的循环活动性机理。
抽油泵防砂是钻采系统防砂的一个重要环节。
The sand control of oil well pump is very important for drilling-production system.
对铸造硅砂的选择性激光烧结进行了试验研究。
Selective laser sintering of foundry silica sands was investigated by experiments.
本文对水泥灰土综合稳定砂的施工工艺进行了介绍。
This paper introduces the construction technology of synthetical steady sand with cement, lime, sand and soil.
通过预测，得到预防出砂的临界生产压差和临界产量。
Gained the critical production pressure difference and the critical output by the model.
理论预测结果与窄筛分砂的突破压力实验结果相一致。
Theoretical predictions for the breakthrough pressure of narrow screened sands agree well with the experimental results.
介绍了胶合砂的基本配方、主要技术指标及防砂机理。
Basic formulation, main technique index and sand control mechanism for agglutination sand are introduced.
对干砂的抗剪强度进行了研究，认为型砂存在咬合强度。
The shear strength of dry sand has been studied, the result shows the interlocking strength existing interdry sands compacted.
天然彩砂使用中不能褪色，这是对天然彩砂的根本要求。
The use of natural sand can not fade, which is a fundamental requirement for natural sand.
该试验结果将对风积砂的工程应用提供了一定的理论依据。
Results of these tests furnish a scientific basis for the use of eolian sand in engineering projects.
根据试验结果，确定了标准砂的临界状态线及临界状态参数。
Then, the critical state lines are provided based on the test results of different stress paths.
本文介绍了直接用氨气(或液氨)代替氨水浸出钼焙砂的方法。
The direct leaching method of roasted molybdenite with ammonia (or liquid ammonia) instead of aqueous ammonia has been described.
本文是针对石英砂的这一缺陷提出了一种新型过滤介质——陶瓷滤料。
To aim at this problem, this paper has proposed a new filtration medium - ceramics filter.
某厂采用粘土砂湿型生产拖拉机铸件，也遇到了铸件表面粘砂的问题。
The factory falls across this question in producing the castings of the tractor.
介绍了片梭织机卷取辊涂布金刚砂的制造工艺，并对制造工艺进行了讨论。
The paper presents and discusses the manufacturing technology of applying emery on batch roller of projectile weaving machine.
本文综述了国内外硅石矿物原料替代天然水晶生产高纯石英砂的研究现状；
So the research of producing the high pure quartz with the silica mineral substitutes for natural quartz is imminent.
通过招标投标作出采砂许可，可以实现采砂船的公平竞争和采砂的有效监管。
Sand excavation permission made through bidding can realize fair competition and effective supervision of sand excavation.
针对大圆筒结构常存在的圆筒间接缝漏砂的问题，提出了一种简单易行的处理方法。
To counter the problem of sand leaks at the joints between cylinders, this paper presents a simple and convenient treatment method.
对中砂的中低氨氮进水系统，通过缩短水力负荷周期，会使去除效果得到明显改善。
For the medium sand system of the low ammonia nitrogen, by shortening HLC, the removal effect of the system is significantly improved.
针对这一问题，开发了适合于多层防砂的KV-3型可以延时固化的网络树脂覆膜砂。
In the light of this problem, we developed KV-3 net resin covered sand for multi - layers sand control.
系统的研究了尾矿人工砂的技术路线、配合比、机械性能和高强混凝土的氯离子渗透试验。
In this paper, the technical channel, match ratio, mechanical property, and anti-chlorine permeability of HPC with tail mineral sand are studied systematically.
消失模铸造干砂充填紧实过程中，干砂对模型壁的动态压力可间接反映此处干砂的紧实程度。
The dynamic pressure on pattern wall can reflect indirectly the compaction degree of sand during the course of filling and compaction of sand on EPC.
如砂石不干净(泥含量较大)、砂的细度模数过高或过低等，也会使混凝土强度降低、泌水性增加。
Such as sand not clean (mud high content), sand the fineness modulus too high or too low, also can make the strength of concrete is reduced, and the water increased.
使用金属砂作为过滤材料，对提高纤维的质量有重要作用。文中对金属过滤砂的构造与性能进行了分析探讨。
As a filtration material, the metallic sand plays an important role for the improvement of fibers quality. Its structure and property are discussed in this paper.
使用金属砂作为过滤材料，对提高纤维的质量有重要作用。文中对金属过滤砂的构造与性能进行了分析探讨。
As a filtration material, the metallic sand plays an important role for the improvement of fibers quality. Its structure and property are discussed in this paper.
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