环管

The author designs a rotary polyacrylate tubular membrane separator with transparence glass outer cylinder and studied the flow field characteristics of its annular gap and the micro-filtration performance by theoretic and actual testing methods for the first time.

本文设计了一套外壳透明的旋转聚丙烯管式膜器，采用理论和流场实测相结合的方法，首次系统地研究了膜器环隙间的流场特征和膜器的微滤特性。

The water transport efficiency in ring-porous species vessels is higher than that in diffuse-porous species and none- porous species, but ring-porous species vessels more easily occur embolism.

环孔材树种导管比散孔材导管和无孔材管胞输水效率高，但它比后两者更容易发生空穴和栓塞。

Troubleshooting: plug removal and replacement of fill, dredge water pipe trench, the correct installation of seal ring; fastener or replacement of the impeller; reduce pump installation, or when the water level rose after the boot.

排除方法：清除堵塞物，更换填料、疏通引水管沟槽，正确安装水封环；紧固或更换叶轮；降低水泵安装位置，或待水位上升后再开机。

In the last two area, heat transfer in narrow annuli is better than that in normal circular tubes.

在层流充分发展区和紊流区，窄环隙的对流换热特性要好于普通圆管。

Velocity distribution of fluid in eccentric annuli with the inner cylinder reciprocating axially［J］.

流体在内管做轴向运动的偏心环空中的速度分布［J］。

The flow of Non-newtonian fluid in eccentric annuli with the inner cyinder moving axially and it's application in preventing pumping rod and oil tube from eccentric wear in a polymer-driving well are studied in this paper.

在采油过程中，由于油井较深的缘故，抽油杆在油管中是处于偏心位置的，聚驱井产出液在抽油杆做轴向运动的井筒中的流动问题就是非Newton流体在内管做轴向运动的偏心环空中的流动问题。

A preferred construction shall be as follows: Bowls zinc free bronze, or niresist or duplex stainless steel; Impeller zinc free bronze, or niresist or duplex stainless steel; Shafting duplex stainless steel or monel; Column pipe Stainless steel 416SS or 316SS Discharge head high strength cast iron with epoxy lined waterways Boltings stainless steel.

一个优先的工程将是依下列各项：碗锌释放青铜，或 niresist 或双三极管不锈钢；推进者锌释放青铜，或 niresist 或双三极管不锈钢；桥系双三极管不锈钢或 monel；专栏以管输送不锈钢 416SS 或 316SS 排成一行航路的和环氧基树脂的解除头高的力量演员阵容铁 Boltings 不锈钢。

But among all the niche manufacturing enterprises (drinking straws, trouser linings, bicycle bells), he finds a factory making nylon-coated rings for brassieres- and the story of a migrant worker with a remarkable memory who has recreatedcomplex machinery blueprints and sold them to a succession of bosses.

但是纵观所有的小商品加工厂（生产吸管、裤衬和自行车铃等小商品），他记录了一个制造胸罩尼龙环的小商品加工厂和一个具有良好记忆力的民工再现复杂机器蓝图又将它卖给下家老板的故事。

For three rings and 12 cathodes, that means that we need 15 pins to control the array.

对于三圆环和12个阴极，那意味着我们需要15个管脚用于控制全部LED。

In order to decrease copolymerization loss of isoprene during thermal dimerization of cyclopentadiene in C5-fraction,the effect of three inhibitors,diethylhydroxylamine,p-tert-butylcatechol and o-nitrophenol,on dienes' polymerization in the process was investigated by experiment with sealed glasstube.

为减少C5馏分环戊二烯热二聚过程中异戊二烯的聚合损失，采用封管实验方法考察了添加阻聚剂二乙基羟胺、对叔丁基邻苯二酚、邻硝基苯酚对热二聚过程中各二烯烃组分聚合程度的影响。

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。