查询词典 water pressure

Selective water shut off action of water shutoff agent, effect of permeability on injection pressure, movability of water shutoff agent are researched, and multi-block design of water shutoff agent, particles diameter selection of water shutoff agent are performed.

对堵剂的选择性堵水作用、渗透率对注入压力的影响、堵剂的耐冲刷性和可动性进行了室内实验，制定了堵剂施工段塞设计以及堵剂粒径的选择方案。

Structural matter drops to hit water with fixed rate phut from certain height, inchoate and main the structure that attacks water process in the light of phut is answered begin research, and press mutation of field of force and Xing Bo to wait to study however to entering the underwater after water less, and add with each passing day as large bridge and marine project much, the construction in these projects and the phenomenon that phut of large construction content also appeared to hit water in use process, like Guangdong 9 rivers big bridge is bumped to break down after collapsing, large area bridge floor falls into surface to wait, the meeting such as mutation of field of pressure of the underwater after this kind of phut hits water and Xing Bo is right all round structural products gives birth to certain influence, evaluate this kind of influence to have real project sense to construction and design.

结构物从一定高度落下以一定速度砰击水面，早期主要针对砰击入水过程的结构响应开展探究，而对入水后水下压力场突变和兴波等却探究较少，而随着大型桥梁和海洋工程日渐增多，在这些工程的施工和使用过程中也出现了大型结构物砰击入水的现象，如广东九江大桥被撞垮塌后大面积桥面落入水面等，这种砰击入水后水下压力场突变和兴波等会对四周结构物产生一定影响，评价这种影响对施工和设计具有现实的工程意义。

In order to do research on pipe flow and pump characteristics of polymer flooding and water flooding rod-pumped well in especially high water-cut stage, rheometric test aimed at production stream from polymer flooding and water flooding rod-pumped well in especially high water-cut stage has been made, and the characteristic of production stream in especially high water-cut stage is confirmed as Newtonian fluid. Experiments using different mediums about pipe flow and pump characteristics is made. Frictional resistance and coefficient of friction resistance of annulus fluid between sucker rod and the pipe flow is calculated under different working conditions. Frictional resistance between plunger and pump barrel under different parameters is calculated based on related theory of pump characteristic and the strained analytical model of oil-well pump. Besides, using the theory of slit flow and hydraulic -clamping pressure, the frictional resistance is calculated, and the error between the result and measured value is no more than 13%.

为研究特高含水期水驱及聚驱抽油机井管流特性与泵特性，本文针对特高含水期水驱及聚驱井采出液进行了流变性试验，确定了特高含水期油井采出液的性质属牛顿流体；利用不同介质，进行管流特性与泵特性试验，得到了不同工况下杆、管环空流的摩擦阻力和摩阻系数；根据泵特性相关理论和抽油泵受力分析模型，计算了不同参数下柱塞与泵筒间的摩擦阻力，并利用缝隙流与液压卡紧力理论对柱塞与泵筒间的摩擦阻力进行了计算，计算结果与实测值误差在13%以内。

This, in turn, trapped in cold water for physical contact when the skin vasoconstriction, blood pressure increased slightly, only a very short time; soon surface on the re-expansion of blood vessels, a large number of vascular blood flow to the skin, the blood pressure at this time, it has not been exposed to cold water than also slightly more.

这又困为身体接触冷水时表皮血管收缩，血压略微升高，只是很短暂的时间；很快表皮的血管就再度扩张，大量血液流向皮肤的血管，这时的血压，就反而比未接触冷水时还稍低些。

Impeller rotates clockwise, the right part of the space between two blades is gradually increasing, in confined conditions, with the air volume increases, pressure decreases, the formation of vacuum pumps and air through the pipeline suction tube into the vacuum pump the right side of the crescent-shaped shell inspiratory mouth to be sucked into vacuum pump, vacuum pump impeller left some space between the two blades is gradually reduced, so the air is compressed, the pressure then increased, and finally through the vacuum pump shell crescent-shaped exhaust port from the left side of vacuum pumps, gas separator into the water box, so that was taken out after the separation of the recycled water reuse.

叶轮顺时针方向旋转时，其右半部分两叶片之间的空间逐渐增大，在密闭条件下，随着空气体积的增大，压力随之降低，形成真空，水泵和管路内的空气通过吸气管，进入真空泵泵壳右侧的月牙形吸气口被吸入真空泵，真空泵叶轮左半部分两叶片之间的空间是逐渐减小的，因此空气被压缩，压力随之增高，最后通过真空泵泵壳左侧月牙形排气口排出真空泵，进入水气分离箱，使被带出的循环水分离后再重复使用。

The influence of the seal water temperature of water ring vacuum bumps on the condenser pressure is analyzed quantitatively,and the relationship between the condenser pressure and the unit efficiency was identified with equivalent enthalpy drop method.

定量分析电厂水环式真空泵密封水温度对凝汽器压力的影响，并利用等效焓降法得到凝汽器压力与单元机组效率的关系，从而得到真空泵密封水温度和单元机组经济性的定量关系。

It proves that tree top leaves suffer from water stress and hydraulic limitation becomes greater with tree height.Water stress influence tree height growth in several aspects:firstly is the influence of exterior water condition,and community average tree height is positive with exterior water condition.Secondly, hydraulic limitation influences individual tree structure and function.Xeromorphic structure,Lower water potential and turgor pressure limit cell division and expansion,which restrict gas exchange and carbon assimilation capability.However,respiration consumption increases with the spread of tree crown.Shortage of nutrient limits carbon investigation on new leave growth and may ultimately limit tree growth.Thus,the main limitation of tree height is water.

水分对树高生长的限制首先是外在的水分状况，群落的总体高度随外界水分状况的变差而变矮；再就是水力限制对单株树木的结构和功能的影响，水势降低、膨压减小使细胞的分裂和扩展受限，旱生型结构加剧水力对气体交换能力的限制、使光合碳同化能力受到限制、而呼吸消耗却随着树木个体的增大而增大，制造营养物质不足、使得营养亏缺、造成投入新枝叶的营养受限，最终限制了树高继续增长。

Experiments of steam - water two - phase flow frictional pressure drop through five vertically and horizontally positioned belieal coils were carried out in the high pressure steam water test loop of Xi an Jiaotong University.

在压力p＝4－14MPa，质量流密度G＝400－2000kg／m2·s，内壁热流密度q＝0－750kw／m2的参数范围内，进行了螺旋管内高压汽水两相流动磨擦阻力的试验研究。

The key problems for the application of high pressure water jet in rust removal and cutting are the easy adjustment and control of high pressure water, the design of the executive mechanism and safe and reliable operation of the equipment.

高压水射流除锈与切割应用关键要解决灵敏调控、执行机构设计、安全、运行可靠等问题，实现商品化。

I plant mainly produces marine distress signals, life jackets and circle, rope-throwing equipment, spare parts liferaft boats, emergency escape breathing apparatus, fire-pressure air ventilation, air bubble gun, fire insulation clothes and the use of water cannon fire, Marine Fire equipment such as five series over 100 varieties of products, which were positive pressure air ventilation, fire insulation clothes, water Paomeimiehuoqi, diving equipment, and other products through seven provincial identification, more than 10 times the municipal science and technology advancement awards Huosheng , products exported the United States, Japan, South Korea, Singapore, Malaysia, Vietnam, the United Kingdom, Hong Kong, Taiwan and other countries and regions.

我厂主要生产船用求救信号、救生衣和圈、抛绳设备、救生筏艇备品备件、紧急逃生呼吸器、正压式消防空气呼吸器、空气泡沫枪、防火隔热服、多用消防水枪、船用消防装备等五大系列100多个品种的产品，先后有正压式空气呼吸器、防火隔热服、清水泡沫灭火器、潜水装具等七个产品通过省级鉴定，十多次获省市级科技进步奖，产品远销美国、日本、韩国、新加坡、马来西亚、越南、英国、香港、台湾等国家和地区。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。