Adequate selection of high-low pressure volume ratio of double-stage refrigeration compression system;
合理选择双级制冷压缩的高低压容积比
Therefore,the influence of the volume ratios of anoxic zone to aerobic zone on denitrifying phosphorus removal in the A2/O process for treating brewery wastewater was studied.
为此以啤酒废水为处理对象,研究了缺氧区与好氧区容积比对A2/O工艺反硝化除磷的影响。
Applying the vector representation of formula for definite proportional division point in vector algebra,this paper obtains a new useful method of compunction for segment ratio in volume ratio.
利用向量代数中定比分点公式的向量形式，给出了一种非常简明有用的求容积比中线段比的新方法。
Method of determination for specific surface of cement
GB/T207-1963水泥比表面积测定方法
Testing method for specific surface of cement--Blaine method
GB/T8074-1987水泥比表面积测定方法勃氏法
High spicific surface, tiny granule diameter, goodactivity, can be used as substitute of well cement or silica flour to imporve well quality.
比表面积大，粒径微小，具有良好的胶凝性能，可替代井油水泥和/硅灰（珠）改善固井质量。
New methods of determining productivity ratio,flow resistance ratio,drainage area ratio and skin factor of horizontal well
确定水平井产能比、流动阻力比、驱动面积比和表皮因子的新方法
There is no free water standing on the surface.
没有自由水积聚在表面。
Surface Techniques Handling Cement Concrete Pavement
水泥混凝土路面的表面处理技术研究
Study on CO_2 Flux of Surface Interface and Rate of Organic Carbon Accumulation in Peatland;
泥炭地表层界面CO_2通量与有机碳积累速率研究
Three-dimensional Finite Element Simulation of Cement Mixing Pile Composite Foundation under Large Area Loading
大面积堆载下水泥土搅拌桩复合地基数值模拟
diesel-oil cement
加有表面活性剂的柴油水泥
The muddy water has a choppy and irregular surface.
泥水表面波浪滔滔且不规则。
INFLUENCE OF SURFACE MODIFIED RUBBER CRUMBS ADDITION TO PORTLAND CEMENT PASTE
表面改性对橡胶水泥石性能影响研究
Preparation, Characterization and Application of High Specific Surface Area Activated Carbon;
高比表面积活性炭的制备、表征及应用
Table1. Left carotid artery intimal areas, ratios of intima area and media area in male rats(± s, n=7， mm2).
表1.雄鼠左颈总动脉内膜面积、膜面积/膜面积的比值.
Proportion of Cement-Fly Ash in Crushed Stone Road Course Stabilized with Cement and Fly Ash
水泥-粉煤灰稳定碎石路面基层中水泥与粉煤灰的比例
a mixture of cement and sand and water that is sprayed on a surface under pneumatic pressure.
用气压喷射在表面的水泥、沙子和水的混合物。
Comparative study of adsorption isotherm and kinetics of superplasticizer on cement and fly ash particles
减水剂在水泥与粉煤灰表面的吸附行为研究
Carbon black used in rubber products--Determination of specific surface area-CTAB test method
GB/T3780.5-1991橡胶用炭黑比表面积测定CTAB法
Method for specific surface area of chrysotile asbestos
GB/T6646.4-1986温石棉比表面积测定方法