机械工程

The catenoids are the only nonplanar minimal surface of roation, the right helicoids are the only skew ruled minimal surface of roation, but they can not be represented in form of NURBS.

悬链面是唯一的旋转极小曲面，正螺面是唯一的直纹极小曲面表示，它们在建筑和机械制造行业有广泛应用，但是它们都不能用NURBS精确表示，这个工程应用带来很多不便。

Earthworks will be excavated mechanically and affiliated with hand works so as to improve work efficiency and ensure dimension accuracy. Foundation forms will be made with plywood which should be scatheless and smooth so as to ensure the shaping of concrete structures are satisfactory.

土方工程采用机械开挖人工配合，以提高工效和保证尺寸准确，基础模板采用胶合板，且投入的胶合板无损坏、不平面现象，以保证混凝土结构的成形符合要求。

The lifetime cost is composed of materials, labor, machinery, engineering, cost of money, insurance, maintenance, refurbishment, and ultimately, demolition and associated disposal, recycling, and replacement, less the value of scrap and reuse of components.

寿命成本的组成材料，劳力，机械，工程，成本，资金，保险，维修，翻新，并最终危及拆迁及相关处理，回收，并更换，减少的价值，废弃和再利用的部件。

High-tzu media Machinery Co., Ltd. uphold "efforts, sustained and innovative" ideas, and constantly self-drive, with our science and engineering capacity to create a variety of practical and complex fabric, for the diversification Market and bring a new application of the solutions to mankind's environmental protection cause, Yong-green water for the day-to make contributions.

高姿滤料机械有限公司秉持"努力、持续、创新"的理念，不断自我驱策，凭着我们在科学及工程上的能力，制造出了各种实用的滤布及复合物，为多样化的市场及应用范围带来了全新的解决方案，为人类的环保事业，为兰天绿水永做贡献。

Our factory specialized production: Each kind of automobile, barometric pressure, hydraulic pressure hose unit steel pipe unit, each kind of project mechanical hydraulic pressure hose, steel pipe unit, semitrailer, nylon coil unit, each kind of harvester hydraulic pipe and attachment body, each kind of large-scale, medium and small-scale tractor pipeline.

我们厂专业生产：各种汽车、气压、液压软管总成钢管总成，各种工程机械液压软管、钢管总成、半挂车、尼龙螺形管总成，各种收割机液压管及接头体，各种大、中、小型拖拉机管路。

The company will supply the U.S. Navy with a machinery control system engineered and certified for shipboard use.

罗克韦尔自动化将为美国海军提供一个机械控制系统在船上应用的工程和认证。

We put the two main engineering machine loading which are sinusoidal wave load and step load, and the results indicate that the dynamic responds are satisfied for the needs of the experiments. Besides, this paper analyzes the influence effects of the tire friction coefficient on different parameters, and then put forwards the experiment method of the performance of the tire friction.

加载工程机械主要的两种加载模式正弦波载荷和阶跃载荷，试验台动态仿真的结果表明系统动态响应性能能够满足试验要求；此外，论文还对不同路面对轮胎附着系数的影响进行了分析，通过这方面的研究，提出研究轮胎附着性能的试验方法。

In real engineering, the two surfaces in sliding contact are rough. And it is an important theoretical part to calculate the coupled temperature and stress of sliding bodies having rough surfaces.

工程实际中，相互接触的滑动摩擦表面是粗糙的，对粗糙表面的瞬时温升和热－机械应力分析有重要的理论意义。

Production plant is built by Liwo machining centers, CNC horizontal boring and milling machines, CNC milling machine portfolio composed of "soft-shell parts production line": production block, cylinder head, gearbox, and other high technology content Shell exports of parts and vehicles and Liwo Liwo CNC machining centers, and other components of the "revolving line of processing": processing the internal combustion engine piston, cylinder differential top shell, shell reducer such as automobiles, engineering machinery, Agricultural machinery industry with high technical content in the rotating parts, as well as between the rotating shell parts and exports between the parts production.

现生产工厂已建由立卧加工中心、卧式数控镗铣床、数控组合铣床组成的"壳体类零件准柔性生产线"：生产缸体、缸盖、变速箱等各种技术含量高的壳体类出口零件；以及数控立卧车和立卧加工中心等组成的"回转体加工线"：加工内燃机活塞、缸头等差速器壳体、减速器壳体等汽车、工程机械、农机行业中技术含量高的回转体零件以及介于回转体和壳体类零件之间的出口零件生产。

A new kind of magnesium alloys has been synthesized by high energy ball-milling of Mg and Fe mixed powders.Due to the high corrosion speed and reacting efficiency,the alloys are generally called super-corroding alloys.A SCA bulk is fabricated through cold-pressing and sintering the mechanically alloyed Mg-Fe powders.The chemical reaction of SCA with seawater rapidly releases heat and hydrogen gas,which may play very important roles in many ocean applications.For example,the reaction heat can be used to keep diver clothes warm;SCA corrosive links with the function of self-destruction can be utilized to control the sinking and floating of sonobuoy, and to salvage the training torpedo or other instruments.In addition,the reaction heat of SCA can be applied to heat food,machinery and ice or snow,which is thus very helpful for mountaineers.

超腐蚀合金采用Mg和Fe混合粉末，经高能球磨机械合金化、冷压、烧结，形成Mg-Fe合金块体，具有很高的海水腐蚀速率和反应效率，该合金化学反应放出的热量和氢气可在海洋工程中发挥重要作用，例如：可为深海作业潜水衣的保暖提供热量；由其制造的腐蚀链通过自毁机制，可用来控制声纳浮标的沉浮时间，打捞和回收水中的贵重仪器、装置以及训练用的靶雷；在偏远地区和寒冷地带，利用该合金的反应放热特性，不仅可加热机械、仪表或食品，而且能为登山运动员提供取暖所需的热量。

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。