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Having studied the relation of oil well paraffine precipitation and the rod load, the paper finds one new method to predict the oil paraffine precipitation ---statistics comparison of the indicator diagram, and calculates the paraffin removal cycle as well as the paraffin removal time And predicts the oil well paraffin precipitation; Combined with the test data of oil field and the basic production parameter of the oil well system, the paper has carried on close analysis of the efficiency of the single well system, and obtained each target reflecting the system operation; the efficiency of the oil pumping mechanical well system has been improved and the submersion pressure mathematical model has been completed, and the author draws up the dynamic control chart of sub-area system efficiency, thus raises the management level in the oil well system efficiency.

通过研究油井结蜡速度与抽油机悬点载荷的关系,将油井结蜡与示功图结合到一起,找到一种对油井结蜡预测的新方法——示功图统计对比法,计算出清蜡周期与清蜡时间,预防了油井蜡卡;以现场示功图为依据,结合生产参数对抽油机井系统效率进行实测分析,完善系统效率与沉没压力的数学模型并绘制油井系统效率动态控制图,对系统效率进行了检测评价与优化。

The special tribo-electdc tester with high sliding speed and electric current was developed,which mail working parameters are, current density up to 2.5 A/mm~2, the sliding speed 100 m/s,the load over 500 N (3.2 MPa) and the pulsant strike pressure within 20 N. This testersuccessfully simulates the tribological and electric properties of strip materials. 2, By using the above tester, study on tdbological properties and carrying currentperformances of copper-base powder metallurgy material and metal impregnation carbonmaterial are carded out.

本论文开展的主要研究内容和所取得的成果如下: 1、首次开发了大电流、高速度和重载荷的载流摩擦磨损专用试验机,能够稳定提供恒定交流电流密度2.5 A/mm~2,相对滑动速度100 m/s(12000 r/min),载荷可达500 N(3.2MPa),脉动冲击载荷可达20 N,为研究提速接触网和滑板的高速载流摩擦学特性及其机理,以及开发新型高耐磨性、高载流性能滑板材料提供了先进可靠的试验手段(该机已获得一项实用新型专利,ZL 2006 2 0096036.5)。

This scheme works in the table up-looking way where the table is derived from the flight envelop sectored according to real time load on hydraulic power system in flight.

该方案按照飞机飞行状态下泵源的实际负载,对飞行包线进行分区和改造,形成可供查询压力控制参考输入的增益调度表。

Have most go qualitative mountain fastness star: Include, cannot go up spring late the arena of one class, but latent capacity becomes network person to enrage God model male, beautiful female; does not know hype, but be full of recreational temperament however curtilage male, curtilage female; does not have distinctive appearance, but those who have bellyful a load on one's mind is crazy male, complain female

最有潜质的山寨明星:包括,上不了春晚一级的舞台,但有潜力成为网络人气偶像的型男、靓女;不懂得炒作,但却充满娱乐气质的宅男、宅女;没有出众外表,但有满腹心事的痴男、怨女

A tour bus driver is driving with a bus load of seniors down a highway when he is tapped on his shoulder by a little old lady. She offers him a handful of peanuts, which he gratefully munches up.

旅行巴士司机正在高速高路中奔驰﹐车上载了一群老人家﹐其中一位老人用手点他肩膊﹐原来是请他吃花生﹐他欣然吃下。

I toted up a load, and went back and set down on the bow of the skiff to rest.

我挑回了一批,回来在船头上坐着歇口气。

The preprocessor of ANSYS is applied to set up fmite element model for wood cutting based on theoretical anylysis and by applying load,numerical simulation at initial stage when wood cutting is accomplished.

2在理论分析的基础上,应用ANSYS的前处理器建立木材切削的有限元模型,通过施加载荷,计算分析,完成对木材切削初始阶段的数值模拟。

The Chinese formation carrying on the mission of convoy is made up of "WuHan" Missile chaser,"Haikou"Missile Chaser,"Huishan Hu" comprehensive depot ship and they load the two helicopters by ship and part of navy members .

担任此次护航任务的中国海军编队由&武汉&号导弹驱逐舰、&海口&号导弹驱逐舰、&微山湖&号综合补给舰组成,并搭载两架舰载直升机和部分海军特战队员。

It is important to make the mounting hardware for the load cell before drilling the holes in the bottom rail, otherwise the mounting holes in the bottom rail may not match up with the boltholes on the top rail.

这是很重要的,使越来越多的硬件负载细胞钻前孔在底部的铁,否则安装孔在底部的铁可能不匹配,与boltholes对顶端的铁路。

Since the machine was designed to focus on heavy load, rack of large steel, Z-axis stroke big, so not only do a small engraving machine technology, but also high-speed cutting thick plate, a feed volume of up to 20mm-30mm, which is carving machine not impossible process.

由于机器设计注重重型负载,机架钢性大,Z轴行程大,因此不仅可以做小型雕刻机的工艺,更可高速切割厚的板材,一次进刀量可达20mm-30mm,这是雕刻机根本做不到的工艺制造。

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。