孔口

Through the characteristic experiment to five PVC filmducts with different hole spacing,a series of design parameter was recom-mended under the allowable error(±10%)of hole discharge air volume per u-nit lengh.

通过在鸡舍环境下对五组不同孔口分布的带孔PVC风管的送风均匀性试验，推荐了在孔口气流一致性偏差允许范围内(±10％)带孔PVC风管的工程设计参数。

Then, designed reasonable grouting construction scheme combined with practical situation of the project. Also, studied key techniques about grouting in loosen rock mass, such as drilling technique, collaring sealing technique and so on.

接着，根据工程实际情况，设计出合理的注浆施工方案；并对松散体注浆工艺中的成孔技术、孔口封堵技术等关键技术问题进行了研究，这些问题的解决保证了松散体注浆工程的顺利进行。

The result indicates that hydraulic resistance coefficient is not constant;it changes with the flow ratio of diffluent and conflux.

在各流态下3种阻抗孔的阻抗系数与分流比的二次曲线图几乎重合在一起，这说明了阻抗孔口的形式对相应阻抗系数大小的影响不大。

The procedure, called Natural Orifice Translumenal Endoscopic Surgery, involves passing surgical instruments, and a tiny camera, through a natural orifice, such as the mouth, to the desired organ.

程序，所谓的自然孔口translumenal内视镜手术，涉及通过手术器械，和一个小小的摄像头，通过自然孔口，如口腔，以理想的器官。

The gel dynamics experiments showed that the gel formation law was similar with the other polymer systems, which wasrelated with dense surface under the soft coagulating condition and the thickening gel; the square of gel thickness was linear with coagulation time. The qualitative analysis of the surface puckers of fibers spun from wet spinning and dry-jet wet spinning was made. The positions where the die swell appeared were not the same and the die swell appeared at the air gap where the fiber would markedly been elongated and vary little in the coagulant, thus the surface of fiber spun from dry-jet wet spinning was more smooth. The radial component concentration gradient was responsible for the radial structure of PAN fiber spun from dry-jet wet spinning. The thicker surface with microvoid structure of

对湿纺和干湿纺进行比较表层沟槽的产生进行定性分析，原因在于孔口胀大区域出现在不同位置，在干湿纺中，溶液的孔口胀大出现在空气层，并在该区完成大部分形变，进入凝固浴后形变很小，纤维表面较为光滑；干湿纺PAN纤维径向结构存在差异，这与丝条内组分由于双扩散进行导致径向上存在浓度差异直接相关；凝固强度较大的体系，可以获得厚度较大且孔结构尺寸较小的皮层；含较少缠结的PAN原液在纤维成形后截面很圆整，但原液缠结浓度增大时成形后圆整度下降；PAN纤维成形是一个远离平衡的过程，凝固作用缓和的体系可以使成形过程靠近平衡，可获得更大尺寸的孔洞结构；原液中少量的非溶剂添加剂显著改变纤维径向结构，可获得孔洞尺寸更小和更为均一的径向结构，这与径向浓度差异的减小、分相时间的集中相关；PAN原液的成形纤维表面依赖于凝固强度；由AFM对相近凝固条件下成形的PAN膜进下

Countersinking : countersinking is the process of beveling or flaring the end of a hole .holes in which countersunk head type fasteners are to be used must be countersunk to provide a mating bearing surface .

沉孔加工：是将孔斜角或镀形孔口，沉孔应当沉头紧固件支承面相配合。

The research shows that, when fluidized gas is used only, it had little effect on the quantity of returning solids, and that the effect of loosed gas is significant. Horizontal opening has distinct effect on the circulating rate only when the loosed gas is larger; the appropriate horizontal opening is corresponding to the gases quantity. The combining of the arced gas distributor and the gases regulating could eliminate the fluidized dead zone in the U-valve effectively.

结果表明，单一流化风对循环量的影响较小，而松动风对循环量的调节幅度比较大；水平孔口开度只有在松动风量较大时对循环量的影响比较明显，而且合适的水平孔口开度与输送风量的大小相对应；利用圆弧形布风板和气量调节相结合可以很好地消除阀体内的流化&死区&。

In derivations of these equations, the discharges which flow through the check gate are calculated with the orifice equation for building the relationship between upstream pool and downstream pool of the gate.

在公式的推导过程中，过闸流量采用的是大孔口出流公式，没有采用工程中常用的闸孔出流公式，这是为了便于建立上、下游渠池间的联系。

In order to improve the effects of flume on its flow pattern at the tail gate,through analyzing of the influence of several commonly-used tail gates upon their flow patterns at their tail segments, and combining the formula of logarithm velocity distribution and that of free discharge from small orifices, a formula of calculating orifice diameter in a new inclined dragging tail gate is deduced.

为了改善水槽尾门对水槽尾部流态的影响，从几种常用水槽尾门对流态影响的分析入手，结合明渠流速分布对数公式和小孔口自由出流公式，并根据分层来流量与孔口出流量相等的原则，推导出一种新型斜拉孔板尾门开设孔径的计算公式。

It can affect the safety of the arch dam, so steel bars are needed near the orifice.

传统的配筋方法是采用弹性理论计算孔口周围的应力分布，用应力图形法进行孔口的配筋计算。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。