The lack of quality sand and stone resources and the deterioration of concrete durability have been two great problems to perplex the building trade in recent years.
优质砂石资源日益缺乏和混凝土耐久性差是近年来困扰建筑业的两大问题。
The high quality sand-body trap is characteristic of a large-scale trap, having furthersome types of reservoir facies and favorable reservoir, which are key factors for hydrocarbon enrichment.
优质的砂岩体圈闭具有圈闭规模大、发育有利的储集相类型和良好储集层的特点，这些是油气富集的关键因素。
Countries and industries of sand enterprise's production and quality conditions with no requirement.
国家和行业也对砂石企业的生产与质量条件无所要求。
The presence of the coagulant increased the quality of sand filtrated water, which resulted in the higher flux.
在场的情况下增加混凝剂的质量砂过滤水，导致更高的流量。
USES material not qualified. Such as sand, stone, aggregate quality unqualified; In addition, mostly because cement volume expansion rate is too large (stability serious adverse).
所用材料不合格。如砂、石、集料质量不合格；除此之外，大多数是因为水泥体积膨胀率太大(安定性严重不良)。
Also used for mechanism artificially system sand, highway, railway, water conservancy, airports, architecture, cement, refractories, metallurgy industries production quality stone.
同时也是用于机制人工制砂、高等级公路、铁路、水利、机场、建筑、水泥、耐材、治金等行业生产优质石料。
Practice indicates that this production process can improve the quality and performance of products and working environment, and it can substitute for conventional sand casting process.
生产实践表明，这种生产工艺对提高产品性能和质量、改善生产环境等起到了一定作用，可以取代传统的砂型铸造。
Because the new station will always have the sand box during the portal links high-quality fast out of the sandbox for the great help.
因为新站一般会有沙盒期间，高质量的门户链接对于快速走出沙盒帮助很大。
The relationship between calcium stearate and sand core as well as casting quality of cylinder head of diesel engine for example is analyzed.
同时，以柴油机缸盖砂芯和铸件为例，分析了硬脂酸钙与砂芯和铸件品质的关系。
This paper describes the effect of composition and granularity of silica sand on glass quality. Brings forward optimal mix proportion of silica sand from various ore-fields.
阐述了不同产地硅砂搭配使用过程中，硅砂成分及粒度组成对玻璃质量的影响，提出了硅砂最优化搭配方案。
Artificial sand producing equipment and technology are main factors for controlling the quality and cost of man-made sand.
人工制砂设备和工艺技术是控制人工砂质量和生产成本的关键因素。
When the pocketed sand is used, the quality and size of the pocket must be controlled strictly.
在采用袋装砂时，必须严格控制袋料质量和加工规格。
Putting the fuzzy mathematics theory into quality evaluation system of sand mold, we provide a quantitative and practical process for check and analysis of quality of sand mold.
将模糊数学理论引入铸造型砂品质评价体系中，为型砂品质的量化分析和考核，提供了一种切实可行的方法。
This method is effective, and it has important significance on improving the quality of sieve analysis sand grains gradation.
方法行之有效，对提高筛析泥沙颗粒级配的质量有着重要的意义。
The growing thermal load of green sand, the quicker recirculation times and the increased requirements on the quality of molding material make new demands on the molding sand preparation.
潮模砂日益增长的热负荷，更快的循环时间以及对造型材料质量要求的提高，对型砂制备提出了更高的要求。
Aims To study the technical properties of zircon sand and PEPSET nobake sand, so as to solve the cast problems caused by the quality of sand.
目的研究锆砂/PEPSET树脂自硬砂工艺性能，用于解决复杂铝铸件由于型砂质量所带来的铸造问题。
The paper not only discusses the construction quality control of backfill of sand cushion, but also provides the simple in-situ test method and deals with the theoretical analysis for its design.
本文针对砂垫层回填施工质量控制，提供了简易可行之现场测试手段，并就砂垫层设计方法作了理论分析和工程实践；
Soil quality is not high, for the sand and sandy loam .
土壤品质不高，为砂土和砂质壤土。
Study was carried out on the effects of application of sulphur fertilizer on yield and quality of winter wheat in sand soil.
在砂质土壤条件下，研究了追施硫肥对冬小麦产量和品质的影响。
Practise of production proves that this method can raise the quality of sand and lower the production cost.
生产实践表明，提高了覆膜砂的质量，降低了生产成本。
Finally, the conditions of molding sand for obtaining best quality castings are also provided.
在本文的最后还提出获得品质优良型砂的条件。
In renovation of the foundry shop, the original used sand suction system was dismantled, which caused lower quality of the molding sand.
在车间改造中，去掉了原有的旧砂吸送系统，而导致型砂质量下降。
This paper presents an automatic sand treatment system which will be able to provide simple sand with good quality.
介绍了一种能供应高质量单一砂的自动化砂处理系统。
Comparative analysis was conducted on the difference of some quality characters and antioxidation of black sand pear and red sand pear fruits.
比较分析了褐皮砂梨和红皮砂梨果实的某些品质性状及抗氧化活性的差异。
Potatoes of high yield and quality can be produced on sand dunes only by adequate irrigation.
只要实施合理的灌溉，在沙地上种植马铃薯可以获得较高的产量和品质。
Potatoes of high yield and quality can be produced on sand dunes only by adequate irrigation.
只要实施合理的灌溉，在沙地上种植马铃薯可以获得较高的产量和品质。
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