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This paper introduced the use of differential pressure meters which use a double cone as the primary differential pressure producer.

美国的煤层气生产者在煤层气计量方面面临的挑战主要包括：在煤层气井口进行准确的气体流量测量的同时，在测量系统的两端要保持一个低的差压值；要妥善处理流量计测量管段中的湿气体问题等。

This paper introduced the use of differential pressure meters which use a double cone as the primary differential pressure producer. Its typical structure helps the V-cone flow meter have strong ability of flow adjustment, and operate with good accuracy at low DP's.

差压式V锥流量计独特的结构使其具有较强的流动调整能力，可测湿气体，能在低差压下测量煤层气等显著优点，已在美国的煤层气工业开采中得到了大量的应用。

This paper referred to simulating the supersonic double cone inlet" s flow field of ramjet pill assisted range projectiles at a variety of working circumstances, pressure contours, density contours and Mach number contours of inlet" s flow field were given When cone combination, relative location of cone core and cowl lip, the pressure of outlet, inflow Mach number and angle were changed, flow field and performance parameters of inlet can be affected. Simultaneity, productive mechanism and inducing factors of the inlet surge were also discussed. Then the best working conditions and the best model of inlet were obtained.

本文对冲压增程弹丸所用发动机的双锥超声速进气道在各种工况条件下的流场进行了数值模拟，给出了进气道流场的等压线图、等密度线图和等马赫线图，从而观察在不同的锥尖角组合、锥芯与外罩唇口的相对位置、出口反压、来流马赫数和攻角时，对进气道流场及性能参数的影响，并探讨喘振现象的产生机理及诱导因素，以便确定最佳的工作状态，得到最优的进气道模型。

When there are boronizing gum one volume label is used to perform automated labelling, in the course of the pressure-sensitive labels are likely to appear on jeyang to the backing sheet for the label in the labeler tension and from the internal volume of the tension of being draggle cause broken belt pressure-sensitive labels.

当有渗胶现象的一卷标签被用来做自动贴标的时候，在贴标过程中很可能出现揭去标签的底纸在贴标机张力和来自卷身内部的张力的作用下被拉断造成贴标断带。

If the gap is too large, when the cylinder pressure cannot be effective to brake-workholders, causing tension too small, resulting in a post by floating roll drawn paper tape under; if the gap is too small, the cylinder is always workholders, brake cylinder pressure cannot adjust the brake pad and brake disk workholders degrees, and there will be draggle the paper tape.

如果间隙过大，当气缸气压变化时不能有效地将刹车片夹紧，导致张力过小，造成开机时浮动辊突然被拉下将纸带绷断；如果间隙过小，则气缸始终将刹车片夹紧，气缸气压变化不能调整刹车片与刹车盘的夹紧程度，最终会将纸带拉断。

At last the mould was designed by the antitype of some kind of notepad. The study of the technology parameters such as drawing temperature , drawing speed , block holder pressure , lubricate condition showed that when the mould clearance was 1.6mm, drawing temperature was 220~280℃, the block holder clearance was 1.16, the block holder pressure was 2 ton we can formed a qualified notepad shell of the fillet radius of 2.4mm.

最后，以某型号笔记本电脑外壳为原型，自行设计、加工了笔记本电脑外壳热拉深模具，对其拉深温度、拉深速度、压边力、润滑条件等拉深工艺参数研究表明，当模具间隙为1.6mm，拉深温度为220～280℃，压边间隙为1.16，采用石墨+机油润滑时，可获得最小圆角半径为2.4mm的笔记本电脑外壳拉深件，所得拉深件贴模性良好、回弹小，达到了设计要求。

ReduceMain fractionation tower,s press drop can enhance inlet pressure of compressor.At the condition of compress ratio is invariable,it can improve system pressure、increase NTS of stabilization tower、reduce stabilize gasoline C4 ratio、improve system absorbent ability.Generic design can hardly reach the best NTS of absorber,so adding absorber,NTS can obviously increase effect so absorb. Because adding absorber'NTS can reduce system dependence on other factors,and it can not lead to the increase of the energy,so it is the best economic method of improving absorb operation effect. For desorber,double feed stream is a economical means but it need adding the NTS.

降低主分馏塔的压降，可以提高压缩机的入口压力，在压缩比不变的情况下提高系统压力；增加稳定塔理论板数，可以降低稳定汽油中C4的含量，系统的吸收效果改善；一般的设计和吸收塔的最佳板数相距较大，所以改造吸收塔的理论板数，它对提高吸收效果往往最显著，又因为改善吸收塔的理论板数会降低系统对其它因素的依赖程度，而且改善它并不增加能耗，所以改造它对提高吸收效果又是最经济的手段之一；对于解吸塔来说，双股进料的工艺很有经济效益，但它需要增加理论板数来实现。

Based on the theory of fluid transmitting pressure, this paper gives a method of dual pressure-out curve for the diagnosis of screw pump well working status.

韩修廷 ，张男，李永东基于流体传压理论，给出了诊断螺杆泵井工况的双憋压曲线法。

Duralumin gasreducer:single stage type diaphragm pressure-reducing structure and Thicken rubber diaphragm are suitable for non- corrosive gas,standard gas, it could ensure the steady output pressure, it hascharacterristics of big scope of application, steady performance and good cost performance.

硬铝气体减压器：单级式膜片减压结构，加厚橡胶膜片，保证输出压力的稳定，适用于非腐蚀性气体、具有适用面广、性能稳定、性价格比高。

Though the plasma pressure in the filament initially is lower than its neighbors, its plasma pressure rose to values comparable to, or sometimes greater than, its neighbors once it started moving earthward fast enough.

虽然在模拟中细丝的初始等离子体压强低于周围压强，但是当它开始迅速向地球方向运动时，它的等离子体压强很快上升到与周围压强相当，甚至有时候大于周围压强的值。

I'm strongly against the death penalty — it's an eye for an eye.

我不赞成死刑——这是以牙还牙的报复行为。

And to get you the support you need, we're enlisting all elements of our national power: our diplomacy and development, our economic might and our moral suasion, so that you and the rest of our military do not bear the burden of our security alone.

并给你们所须的支援，我们正徵召国家所有各种的力量：我们的外交及发展，我们的经济力量与道德劝说，所以你们与其他军人不须要孤独地负起国家安全的责任。