孔口

By means of formula of orifice come out, Bernoulli equation, formula of discharge along way and law of lose, general group of equation of discharge flow was established.

运用孔口出流公式、伯努力方程、沿途泄流公式及损失规律，建立了泄流管路的通用方程组。

The boundary element method is applied to find a numerical model on 2-D orifice in this paper.

本文利用边界元法建立了一个求解二维孔口的数学模型。

But also the soft rubber nipple, orifice big, baby food with quick and labor-saving; milk sugar than breast-high, sweet, so that a baby drinking feel great.

而且橡胶的奶嘴又柔软，孔口又大，宝宝吃起来又快又省力；牛奶的糖分还比母乳高，甜甜的，让小宝宝觉得好喝极了。

Canula, and orifice features may be varied to suit particular requirements, provided these are within the practicabilities of the impact extrusion process on a mass-production basis.

5管口，导管和孔口的形态可以根据不同的需要而有所变化，但是前提是它必须能够承受大规模生产过程中的冲挤压力。

A type of quick-opening valve whose orifice is opened and closed by a disk that pivots on a shaft in the throat of the valve.

一种快开式阀门，其孔口的开启和关闭靠装在阀门颈部枢轴上的圆盘。

That is, both numerical simulation and model experiments are complemental to each other. The main point of the thesis are as following:1. Vertical pipe inlet/outlet is simplified as an axisymmetric model in the research, and flow field is simulated with second-moment Reynolds stress model and VOF.

本文的主要工作有： 1、将竖井式进／出水口概化为轴对称模型，应用雷诺应力模型和自由面常采用的VOF法，对抽水和发电工况下竖井扩散段、孔口、防涡梁下的水流流动特性进行了数值模拟。

Calculation of stress concentration calculation orifice complex variable function method.

详细说明：计算孔口应力集中的计算复变函数方法。

Combustion process of a ceramic heat insulated compound engine was experimentally studied in a constant-volume combustion bomb and a B1135 type single-cylinder diesel engine.

结果表明，由于陶瓷隅热复合机的压缩终点温度和压力很高，使滞燃期过短，空气粘度高，着火点在喷油嘴孔口附近，初期火焰横贯喷注，使空气与燃油混合条件差，因而仍沿用常规发动机燃烧系统参数时，燃烧过程恶化、燃油消耗率上升。

For the arch dam which reservoir has no suitable breach to build lasher and has mass flood discharge, opening large orifice for flood discharge has great advantage.

对于库区无适宜垭口可兴建泄洪道，而泄洪量又较大的拱坝工程，在坝身中开设大孔口泄洪具有显著的优越性。

The purpose of opening the orifice was to sluice. The influence of fluctuating pressure upon the dam was another problem which was concerned by engineer. The paper analyzed Shuangkoudu masonry arch dam. The result indicated that the dam natural frequencies which consider the dam and the reservoir water interaction have great different from the preponderant frequencies of fluctuating pressure, the dam's first rank of vibration was far away from the high energy region of the fluctuating flow, so the sympathetic vibration would not take place.

坝身开设孔口主要目的是为了泄洪，泄洪时水流脉动压力对坝体结构动的影响是设计人员关心的另一课题，论文针对双口渡浆砌石拱坝进行了分析，研究结果表明：在考虑坝体一库水相互作用时坝体自振频率和水流脉动压力的优势频率相差较大，坝体的一阶振动远离脉动水流的高能量范围，二者不会发生共振。

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％。