拍门

我们不停地拍门、叫喊，他们才开了门。

We had to hammer and shout before they would open up

双节拍门水头损失系数模型试验研究

Model study on the head loss coefficient of two-stage flap valves

听起来似乎有人在拍门。

It sounds as if someone is knocking at the door .

您正在干甚么时，有人正在拍门？

What were you doing when someone knocked at the door ?

拍门压力分布和运动阻力试验研究

Study on Pressure Distribution and Motion Drag of Flap Valve

大型拍门液压缓冲装置试验研究

Study on Dynamic Characteristics of Flap valve and Hydraulic Buffer

泵站拍门撞击力的简化计算方法及其应用

Simple Method for Calculating Impulse Force by Flap Valve in Pumping Station

二阶段工作拍门模型试验研究

Study of Model Test on Two Step Operated Flap Valve

大套泵站拍门技术改造方案的研究

Studies on Technical Renovation Program of Data Pumping Station

带有缓冲装置的大型拍门撞击力的研究陕北石油秩序

Research in Impact of Clapping Gates with Oil Dashpot in Large Size Pumping Station

大型整块式拍门的优化设计

The Optimizing Design of Giant Integral Slap Door

当一个汉子用他有力却倦怠的手拍门时我想到。

I thought , as a man knocked on the door with a firm but weary hand .

动态规划法在大型泵站拍门最优设计中的应用

The application of dynamic programming in the optimum design of flap valve for a large pump station

他没听见拍门声，由于他正在听收音机。

He didn 't hear the knocking at the door because he was listening to the radio .

拍门主要安装在排水管道的尾端，用于防止外水倒灌。

Flap valve is mainly installed in the end of drainage pipeline to prevent extra water flow backward .

而切尔西方面有可能派出德罗巴和托雷斯双鬼拍门。

The chances are it will be Didier Drogba , although Fernando Torres will be introduced at some point .

安装平衡锤是减少拍门阻力和能源消耗的主要技术措施。

The erection of counterweight is the main technical measure for reducing the flap valve resistance and energy consumption .

风像一个疲倦的人在拍门，像一个主人，“进来，”我勇敢地回答；

THE WIND tapped like a tired man , And like a host ," Come in ," I boldly answered ;

我洗澡，她就在外边拍门，一边敲一边哭，一会儿才很不甘心地走开。

I take a shower , she patted outside door , while side to cry , very unwilling to go away .

通过试验测定了拍门的压力分布系数、冲力中心及冲力系数的值。

The pressure distribution coefficient and its centre and the pressure coefficient are measured on the basis of the model test of flaps .

逆止阀的作用是防止水倒流，有了拍门后，也就不需要逆止阀了。

The role of the check valve to prevent water backflow , with the film door , also do not need a check valve .

本文结合安徽滁河一级站拍门技改工程，对充气浮箱式拍门的工作特性和设计计算方法作些研究。

Chuhe Pumping Station of Anhui province , the working characteristics and design methods of air-filled floating flap valve are studied in this paper .

文中通过对拍门运动的系统分析，建立了带有约束条件和目标函数的数学模型。

Based on a systematic analysis of the movement of the flap valve , a mathematical model with constraint conditions and objective functions is established .

采用数值模拟与模型试验相结合的方法对模型泵装置出口拍门的阻力损失进行研究。

In order to investigate the resistance characteristics of flap gate , the experimental and numerical simulation studies of resistance loss of flap gate were performed .

它可使拍门在不增大水头损失的前提下，撞击力减小50%～75%。

By the way , the impact force of the flap valve is reduced 50 % to 75 % , while the water head loss remains unchanged .

在计算过程中，比较完整地考虑了各种阻力矩对起动过程的影响，同时重点考察了平直管出水流道，具有快速闸门带小拍门断流装置形式的起动效果。

All kinds of resisting moment effects upon pump start-up process are fully considered and the different operational results of outlet gate with little flap valve are also reviewed .

本文提出一种新的非均质拍门，可使拍门在启门时顶铰免受冲力，在稳定运行时拍门水头损失为零。

This paper presents a nonuniform slap door , whose top hinge refrains from impact when the door is opened and the head loss of the water is zero when the door running steady .

拍门是轴流泵站主要截流闭锁装置之一，其动态特性与泵装置停泵过渡过程中泵机组动力学特性、管路系统瞬交流及液压启闭机构动态特性等有关。

As one of the imported valves in axial pumping stations , the moment characteristics of flap valve is related to hydraulic transient of turbine , time dependent flow of pipe system and dynamic characteristics of hydraulic hoist .

拍门装置是泵站工程中一种常见的断流装置，其结构简单、运行可靠、价格低廉、维修方便，在中小型泵站工程中得到广泛应用。

Flap valve is one of the most important cutoff device in a pumping station project . It has simple structure , convenient maintenance and low cost , and is quick and reliable . It has been widely used in small and medium-sized pump stations .

看能不能拍个特写门后的是那个侄子吗

See if you can get closer.Is that the nephew ?