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Introduced by technicians of Lifan Motors, the technical difficulty of EV mainly concerns on the optimizing design and displacement, long life-span triphylite batteries with high-speed charging and discharging, and the integration design of electric driving system.

据力帆汽车技术人员介绍，纯电动汽车研发过程中的技术难点主要集中在整车的优化设计和布置、快速充放电且长寿命的磷酸铁锂电池组，以及电驱动系统的一体化集成设计等几个方面。

In allusion to these difficulties, in the process of researching and developing Lifan320 EV, technicians will attach importance to overcoming small EV unit and the structure of driving system and the optimizing match of parameters; high-performance brushless permanent-magnet motor and the design and industrializing of controller; long life-span triphylite batteries with high-speed charging and discharging and research and industrializing of management system; research of motor, automatic clutch and two-gear transmission; key techniques such as strong power techniques, EMC techniques and whole unit test.

针对这些难点问题，在力帆320的研发过程中，技术人员将重点攻克小型纯电动汽车整车及驱动系统的结构及参数的优化匹配；高性能永磁无刷电机及控制器的设计及产业化；可快速充放电型、长寿命磷酸铁锂电池组及管理系统的研发及产业化；电机、自动离合器及两挡变速器一体化驱动系统的研发；强电安全技术、电磁兼容技术、整车试验等关键技术。

In the last few years, monolithic joint has been gradually adopted in the long span steel truss bridge.

近年来，整体节点在大跨度钢桁梁桥中逐渐被采用。

Integral joint is a new-type structure that has been already adopted in the long span steel truss bridge in the last few years.

整体节点是近年来在大跨度钢桁桥中采用的一种新型结构型式。

The wind tunnel experiment,project argument,structure calculation analysis, calculation of the joint bearing capacity, calculation and experiment of the support-joint load carrying capacity of a super-span stretched stereoscopic steel pipe trussing are introduced- A normal usage period of the project after it had been built indicates that the major trussing and the supporting structure below have enough bearing capacity and deformability, and meet the demands of design code and actual usage.

摘要］介绍了某超大跨度伸臂立体管桁架结构的风洞试验、方案论证、结构计算分析、节点承载力验算、支座节点承载力验算和试验等。该结构建成后一段时期的正常使用表明，工程的主体桁架和下部承力结构具备较强的承载变形能力和可靠的安全度，满足设计规范和实际使用要求。

Keywords:super-span stretched stereoscopic steel pipe trussing; wind tunnel experiment; joint; prestressed; composite steel and concrete; diagonal column

关键词］超大跨度伸臂矩形立体管桁架；风洞试验；节点；预应力；型钢混凝土；斜柱

While analyzing the crackie of the ball mill, in order to forecast the expansion speed of the crackle and the surplus life-span of the ball mill tube, some relevant theory of fracture mechanics was combined with finite element analysis for the first time, this is a better way with practical innovation.

在分析球磨机裂纹时，首次将有限元分析的结果与断裂力学中相关理论结合起来，对球磨机筒体进行了裂纹扩展速度预测和剩余寿命预测，具有一定的实用创新性。

We observed the tumorous growth, general state of health and life span of all groups nude mice, measured tumor diameter and calculated tumor volume.

观察各组裸鼠肿瘤的生长情况、裸鼠的一般情况与生存期，测量肿瘤直径并计算瘤体积。

The graticule, the could also be used as a range-finding aid: if the span of a twin-engined fighter filled the graticule, the range would be 274 m (300 yds); if it filled the radius it would be 549 m (600 yds).

这个分划还能用来帮助测距。如果双发战斗机填满分划，距离是274米（300码）；如果填满半径的话，就是549米（600码）。

The graticule, the could also be used as a range-finding aid: ifthe span of a twin-engined fighter filled the graticule, the rangewould be 274 m (300 yds); if it filled the radius it would be 549 m(600 yds).

这个分划还能用来帮助测距。如果双发战斗机填满分划，距离是274米（300码）；如果填满半径的话，就是549米（600码）。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。