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1)  mechanism sand instead of natural sand
机制砂代替天然砂
2)  natural sands
天然砂
1.
Rock powders are used as admixture to the natural sands for roller compacted concrete of Jinghong hydroelectric project;
景洪水电站碾压混凝土天然砂的级配改善措施
2.
Two lab-scale Constructed Rapid Infiltration Systems (CRI) have been designed to treat bath wastewater by using natural sands for seven months.
以天然砂作为主要渗滤介质处理洗浴污水的试验研究的结果表明,在相同的水力负荷条件下,采取2种明显不同的水力负荷周期运行,人工快渗系统对洗浴污水的污染物去除效果具有明显的差别,通过缩短水力负荷周期,提高了人工快渗系统的复氧效率,增大了水在系统中的停留时间,快渗系统的污染物去除效果得到了明显改善。
3.
In the light of the low Hydraulic Loading of traditional wastewater rapid infiltration land treatment system, a experiment project of building Constructed Rapid Infiltration (CRI) system by using natural sands is put forward.
针对传统污水快速渗滤土地处理系统水力负荷低,占地面积大的弱点,提出了采用渗透性能良好的天然砂作为主要渗滤介质建立人工快速渗滤系统的试验方案,并以受污染河水为研究对象进行了为期一年的现场试验研究。
3)  natural sand
天然砂
1.
Properties of artificial sand and natural sand;
机制砂与天然砂的性能研究
2.
Through comparison of the applying effects of man-made and natural sand in slurry and concrete,it shows man-made sand could take place of natural sand and can improve the durability and hardness of slurry and concrete.
通过人工砂和天然砂在砂浆和混凝土中的使用效果对比,说明采用人工砂替代天然砂,可以提高砂浆和混凝土的强度及耐久性,从而得出人工砂是配制砂浆和混凝土理想细骨料的结论。
3.
In this paper,the influence of natural sands,manufactured-fine aggregates and micro-fines in the manufactured-fine aggregates on some performances of highstrength concrete was tested by the method of contrast,which included workability,compressive strength,Young s modulus,drying shrinkage and creep.
采用对比的方法,研究了天然砂、机制砂及机制砂中的石粉质量分数对高强混凝土的工作性、抗压强度、弹性模量、干缩和受压徐变的影响。
4)  natural river sand
天然河砂
5)  activated carbon
天然锰砂
1.
Treatment of zinc plating wastewater by the mixture of activated carbon and nautural maganess oxide;
活性碳—天然锰砂混合处理镀锌废水的初探
6)  nature medium sand
天然中砂
补充资料:机制
  “机制”指的是有机体的构造、功能和相互关系,泛指一个工作系统的组织或部分之间相互作用的过程和方式,如:市场机制、竞争机制、用人机制等。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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