查询词典 jet

The actual production needs from oil field,aimed at tractor hoist that need replace pipe string and outside slippery jet pump that isn′t satisfied with discharge fracturing quickly in reality,a new type of jet pump inside sleeve type of jet pump is designed.

针对外滑套式射流泵在油田应用中不能满足压裂后快速排液的现况，研制出了一种新型的内滑套式射流泵，并提出了射流泵、喉嘴距、喉管长度、扩散管角度及长度的计算公式。

The working principle, system composition and function of EG steam jet pump was introduced, and the energy saving effect and advantages of EG steam jet pump comparing with the existing water steam jet vacuum pump were analyzed.

介绍了乙二醇蒸气喷射泵的工作原理、系统的组成及作用，分析了乙二醇蒸气喷射泵与原有水蒸汽喷射真空泵相比的节能效果和优点。

This paper focused typical sand jet fracturing used in foreign countries and introduced in detail the development of jet structure and connection and its application procedures. The application of two typical sand jet fracturing tools was introduced.

着重介绍了目前国外典型的水力喷砂压裂工具，阐明了国外喷射器结构及其连接方式的发展，国外所使用两种典型工具的结构、作用及其操作步骤，并对这两种井下水力喷砂压裂工具的应用进行了介绍，说明了其适用性。

A typical domestic sand jet fracturing tool is introduced. The basic structure of jet was introduced. The field applications indicate that sand jet fracturing is effective in improving production.

并对国内所使用的典型水力喷砂压裂工具进行了介绍，给出了工具中关键部件喷射器的基本结构，并联系国内现场实际的应用情况，说明了水力喷砂压裂是一种有效的增产技术措施。

"I did not expect the jet in M87 or any other jet powered by accretion onto a black hole to increase in brightness in the way that this jet does," says astronomer Juan Madrid of McMaster University in Hamilton, Ontario, who conducted the Hubble study.

&我无法预测M87核心喷流或者其他由黑洞补充的喷流的增亮行为&，哈勃研究专家组带头人、加拿大安大略省哈密尔顿市麦克马斯特大学的天文学家胡安。

Comparison between the stress of swirling and common jet nozzle tells that the former maximum stress is far larger that the latter. It can explain that the wear of swirling jet nozzle is more severe than common jet nozzle. The way how various parameters effect the wear of the nozzle is carefully studied in the article.

对比了旋转磨料射流喷嘴和普通磨料射流喷嘴的应力情况，结果表明：前者的最大应力远大于后者，这可以很好地解释旋转磨料射流喷嘴比普通射流喷嘴磨损严重的现象。

The force on the jet pipe in the hole jetted is analyzed, and it is indicated that the resistance on the jet pipe is the main factor influencing the feeding of jet pipe.

分析了喷管在喷孔内的受力，指出喷管在喷孔内所受的阻力是影响喷管送进的主要因素，据此调节喷管送进控制液缸控制腔的压力可控制送进速度和限制最大推力。

It firstly did numerical simulation towards pulsed liquid jet pump's throat pipe when it was working on different area ratio, different length of throat pipe, different working situation. Then it analyzed and proposed the optimization length of throat pipe on pulsed liquid jet pump; In chapter 5, it did experimental study on the fundamental performance of steady and pulsed liquid jet pump, then compared the experiment result with numerical simulation result, this approximately agreed with each other.

首次对脉冲液体射流泵在不同面积比、不同喉管长、不同工况下的喉管内部流场进行了数值模拟，分析提出了脉冲液体射流泵的最优喉管长度范围；第五章对恒定、脉冲液体射流泵的基本性能进行了试验研究，对比试验结果和数值模拟结果，二者吻合较好。

Because of the differences of erection angle during missile launching time,the jet flow in jet pipe which has the properties of high temperature and high velocity,erodes and ablate the antenna of launch vehicle.

在发射过程中，由于导弹发射时，起竖角不同，喷管处的高温高速燃气对发射车天线的冲刷和烧蚀，不同程度地影响地面通信。

And the southwest low level jet and southeast low level jet provide it strong warm advection and vapor transport.

低空有西南和东南风急流为其提供强的暖平流和水汽通道。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。