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By the simulation comparison it is clear that the downcomer greatly affected the severing calculation of multicomponent distillation columns, therefore it is more reasonable to consider the effect of downcomers.

通过仿真对比表明，降液管对多元精馏塔的分离计算具有较大的影响，考虑降液管的影响将更加符合实际工况。

In the organic glass tower of 600mm in diameter, the pressure drop, leakage and mist carrying of the high efficient flow-guided sieve tray were measured in the experiment and we found that there was no flooding phenomenon when the resident time of liquid in the downcomer was less to 2. 5 second. It shows that the structure of the tray is reasonable and it can increase the column capacity greatly.

在自建的φ600mm有机玻璃塔内对高效导向筛板的各项流体力学性能进行有关实验研究，其中发现在高气速下当液体在降液管中的停留时间低至2.5秒时，仍没有观察到液泛现象，说明高效导向筛板可在不改动降液管的情况下大规模地提高塔设备的液相通量和生产能力。

The reasons that the research of NEA photo-electric cathode in our country lags greatly behind the other foreign countries which possess the advanced technologies mainly lie in the following facts: besides the lack of enough investment in this field and the draggle of relative technique on the NEA , t...

我国NEA光电阴极的研究距离国外先进水平差距较大，寻其原因除了资金投入不足，相关技术落后等因素外，缺乏对每一环节有效的测试分析手段和监测控制方法是制约我国阴极发展缓慢的一个重要原因。

Dramatic play, greatly enjoyed by young children, can promote the development of children's emotion, cognition and sociality.

表演游戏是深受幼儿喜爱的一种游戏形式，能促进幼儿情感、认知和社会性的发展。

Consequently the using of the flexible drawgear can improve the drawing status and the riding comfort conditions of the tractor-trailer combinations greatly under the condition of stationary random excitation.

因此使用柔性牵引装置后大大改善了挂接车辆在平稳随机路面激励状况下的牵引运行状况和纵向平顺性状况

If the bore-sized disc filters are reduced, the DREE content should decrease obviously, but the shale normalized patterns totally show weak variety, with the degree of Eu-anormaly changing greatly, which suggests that the particle adsorption is important to Eu.

2减小过滤孔径，DREE的含量明显减少，但页岩标准化模式总体上变化不大，其中Eu的异常程度发生了明显变化，说明颗粒物吸附作用对Eu的影响比较大。

To put it briefly, they think water and soil conservation only make soil, stone and dreg fixed, in another word, not allow it take place displacement, it doesn't deeply prevent land from degrade in the land care that make the guidelines of the projects, the measure adopt in water and soil conservation, etc. differ from the basic goal of water and soil conservation greatly.

简单的说，认为水土保持仅仅是把土、石、渣固定下来，即不让其发生位移，没有深入到防止土地退化方面的土地保育，使得方案的指导思想、采用的水土保持措施等与水土保持的根本目的相去甚远。

The high chrome cast-iron added a variety of drib and microscale elements was used to make the flat hammer in overpressure turbine crusher,which can improve the wearing resistance and synthesize mechanical property of the products greatly,and the life of the products is 4 times longer than the former high-manganese steel .

在高铬铸铁中加入多种少量和微量合金元素用以生产反击式破碎机板锤，可使产品耐磨性和综合力学性能得到很大程度的改善，使用寿命比原用高锰钢提高4倍以上。

It has shown that the drift velocity is relatively more intense near the wall which greatly affects the turbulent suspension and transportation diffusion of the sediment.

通过数值模拟和理论分析说明了相间漂移速度在靠近床面的区域内相对较为显著，这对于泥沙的湍流悬浮和输移扩散有较大的影响。

It is shown through computation that the orientative exploring capacity of the tool is greatly enhanced because of the existence of the drill collar.

计算发现，钻铤的存在大大提高了仪器的定向探测性能。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。