机械工程

In practice, the problems in the vibration utilization are nonlinear that is caused by various factors, and show different forms.

振动利用包括机械振动的利用、波动与波能的利用及电、磁、光振荡器在工程技术中的利用等。

And on the basis of that the framework of conceptual design knowledge management based on ontology was put forward.

将研究成果应用于工程机械知识管理系统中，验证了该成果的实用性和有效性。

Hydrostatic transmission is widely used in construction machine. The research of one of its hard cores, low speed high torque radial piston motor, is very important. To directly estimate the life of this kind of motor, and to design a orbit curve with the longest life at same condition, this paper gives theoretic research of the equal contact stress inner curve of radial piston motor. The research is divided into four parts:1 Taken all forces the piston endured into consideration when radial piston motor working, the force between roller and orbit is deduced.

静压传动技术在各类工程机械中得到广泛的应用，对作为其核心部件的径向柱塞式低速大扭矩液压马达的研究显得十分重要，为了能直接对这种马达进行寿命估计，并能在相同工况下求得寿命最长的轨道曲线，本文从设计等接触应力内曲线的角度对这类马达作探讨性的研究，主要从以下四个方面进行：(1)综合考虑径向柱塞式液压马达工作时的各种主要受力状况，对柱塞组件进行受力分析，并通过仿真分析影响轨道和滚动体间正压力的各个因素，得到正压力的简化表达式。

BCEG has completed most of the foreign embassies in Beijing and numerous diplomatic apartments since 1957,as well as many international operated 5 Star hotels,such as the Sheraton Great Wall hotel,New World Courtyard Beijing,Hyatt Grand Hotel,Kunlun Hotel,Beijing Grand Hotel,Beijing Continental Grand Hotel,Jianguo Hotel,Hotel New Otani Chang Fu Gong,etc..

北京建工集团成立于1953年。历经50年的发展已成为由200余家企业组成的，集设计、科研、施工、建筑安装、机械制造、材料供应为一体的。年竣工能力达300万平方米。公司自1957年以来承建了绝大多数外国驻华使馆及大批外交公寓，承担了近20个国家和地区经援工程施工。

A visitor survey carried out at HANNOVER MESSE 2009 revealed that over 75 percent of the attendees want to invest in new and improved technology:"We offer a marketplace for the entire spectrum of automation technology - ranging from mechanical and plant engineering to process automation and automation systems for industrial buildings," explains Wolfgang Pech, Senior Vice President at Deutsche Messe AG with special responsibility for HANNOVER MESSE.

一项对2009年汉诺威工业博览会参观者的调查显示，超过百分之七十五的与会者希望投资于新的和改进技术，德国汉诺威展览公司高级副总裁，汉诺威工业博览会的特别负责人Wolfgang Pech解释说："我们为自动化技术的整个范围提供市场-从机械和设备工程到工业建筑的过程自动化和自动化系统。"

This company, located at Yantai-a beautiful port city, is one of the specializingmanufacturers of track roller, carrier roller, pedrail assembly large bulldozer and excavator.

它地处美丽富饶的港城——烟台，海陆空交通便利，是国内专业生产大马力推土机、挖掘机等工程机械履带总成和支重轮、托链轮总成的专业化厂家之一。

The abrasive wear of metal of four flux-cored wire for repairing of pedrail engineering machine was studied experimentally on a ML-225 wet sand abrasive tester. The surface of abrasive wear specimen and its microstructure were investigated by scanning electron microscope after completion of wear test.

利用ML-225型湿砂橡胶轮式磨损试验机、扫描电镜对所开发的四种用于履带式工程机械行走机构堆焊修复用药芯焊丝的熔敷金属磨粒磨损性能进行了试验研究。

And various non-standard hoisting equipment to provide systematic service for metallurgy, electric power, machinery, mining, quay and petrification industry, etc. The product sells well home and abroad.

公司主要产品有单梁起重机、双梁起重机、门式起重机、铸造起重机、架桥机等路桥工程设备及各种非标起重设备，为冶金、电力、机械、矿山、港门、石化等行业配套服务，产品远销国内外。

Pile driver. Wells, and other professional engineering machinery and accessories manufacturers.

煤勘。桩机。水井等工程机械及配件专业厂家。

TaiShan Construction Machinery Group Co., Ltd. is a professional producer of pipelayer.

公司是吊管机等工程机械的专业生产企业。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。