众文网1.急求液压方面英语论文一篇
When open- or tandem-center valves are used in circuits requiring pilot pressure to shift the valves, there must be a means of maintaining pressure when the valves are in neutral. One method is to install a backpressure check valve in the tank line. The check valve maintains a backpressure of, say, 50 psi. Low-pressure retraction Energizing the solenoid extends the cylinder at a maximum pressure corresponding to the main system relief valve setting. De-energizing the solenoid valve retracts the cylinder and holds it retracted at the reduced pressure setting of the pilot relief valve. The check valve prevents the pilot relief valve from operating during cylinder extension. Two relief valves Using two relief valves in this circuit gives two working pressures. On the up stroke of the cylinder, the low-pressure relief valve limits system pressure. During the down stroke, the high-pressure valve limits maximum press tonnage for doing work. Using the low-pressure relief on the up stroke saves power by supporting the cylinder with low-pressure fluid. Reduced pressure In a system with only one pump, reduced pressure for one branch of the circuit can be obtained with a pressure-reducing valve. This circuit is typical for a welder, which requires high clamping force to be set by the relief valve and reduced force on。
2.~英语高手来啦,液压论文摘要翻译~
Hydraulic Pump Station is to drive the use of electric motors, fuel tanks, hydraulic relief valve, etc., including the source device or the hydraulic control valve device, including. General principles of its role in motor driven pump to provide the pressure source, through the chip, such as hydraulic valve drive device (the fuel tank or motor) to the direction, pressure, flow regulation and control of action to achieve the various provisions. Hydraulic station on various occasions is widely used in hydraulic power transmission, it can be highly integrated and fully automatic control, the space can be made in accordance with the specific corresponding shape points on the hydraulic design of great practical significance . In this paper, the subject "before the bridge hydraulic system design - on the 2nd valve station" based on the former bridge some of the hydraulic system components detailed design of structure. First of all, set the modalities for the implementation of hydraulic components and the structure and function parameters, and then for the function of this hydraulic station, institutional characteristics, the initial stop to determine the hydraulic system schematic diagram, and then the hydraulic system of the various components of the standards in detail Select pieces, and finally the entire system will optimize the combination of various components and the check.。
3.英语高手来啦,液压论文摘要翻译~
Hydraulic Pump Station is to drive the use of electric motors, fuel tanks, hydraulic relief valve, etc., including the source device or the hydraulic control valve device, including. General principles of its role in motor driven pump to provide the pressure source, through the chip, such as hydraulic valve drive device (the fuel tank or motor) to the direction, pressure, flow regulation and control of action to achieve the various provisions. Hydraulic station on various occasions is widely used in hydraulic power transmission, it can be highly integrated and fully automatic control, the space can be made in accordance with the specific corresponding shape points on the hydraulic design of great practical significance . In this paper, the subject "before the bridge hydraulic system design - on the 2nd valve station" based on the former bridge some of the hydraulic system components detailed design of structure. First of all, set the modalities for the implementation of hydraulic components and the structure and function parameters, and then for the function of this hydraulic station, institutional characteristics, the initial stop to determine the hydraulic system schematic diagram, and then the hydraulic system of the various components of the standards in detail Select pieces, and finally the entire system will optimize the combination of various components and the check.。
4.急求一篇关于起重机的英语介绍,用于毕业论文,最好有汉语翻译的
Crane is a kind of lifting machinery, is a for loop, intermittent movement. A cycle of workincludes: extract from extract ground to bring up the product, then move to the designated placedown the items, then the reverse movement, the fetching device back in situ, so as to carry out the next cycle.
起重机属于起重机械的一种，是一种作循环、间歇运动的机械。一个工作循环包括：取物装置从取物地把物品提起，然后水平移动到指定地点降下物品，接着进行反向运动，使取物装置返回原位，以便进行下一次循环。
少不少 少的话追问 别忘了财富值
5.哭求机械类毕业设计—滑台（英文文献）
机械，机电类毕业设计1毕业设计 可伸缩带式输送机结构设计 2毕业设计 AWC机架现场扩孔机设计3毕业论文复合化肥混合比例装置及PLC控制系统设计 4机械设计课程设计 带式输送机说明书和总装图4毕业设计 冲压废料自动输送装置 5专用机床PLC控制系统的设计 6课程设计 带式输送机传动装置 7毕业论文 桥式起重机副起升机构设计 8毕业论文 两齿辊破碎机设计 9 63CY14-1B轴向柱塞泵改进设计（共32页，19000字） 10毕业设计 连杆孔研磨装置设计 11毕业设计 旁承上平面与下心盘上平面垂直距离检测装置的设计 12.. 机械设计课程设计 带式运输机传动装置设计 13皮带式输送机传动装置的一级圆柱齿轮减速器 14毕业设计（论文） 立轴式破碎机设计 15毕业设计（论文） C6136型经济型数控改造（横向） 16高空作业车工作臂结构设计及有限元分析 17 2007届毕业生毕业设计 机用虎钳设计 18毕业设计无轴承电机的结构设计 19毕业设计 平面关节型机械手设计 20毕业设计 三自由度圆柱坐标型工业机器人 21毕业设计XKA5032A/C数控立式升降台铣床自动换刀设计 22毕业设计 四通管接头的设计 23课程设计：带式运输机上的传动及减速装置 24毕业设计（论文） 行星减速器设计三维造型虚拟设计分析 25毕业设计论文 关节型机器人腕部结构设计 26本科生毕业设计全套资料 Z32K型摇臂钻床变速箱的改进设计/ 27毕业设计 EQY-112-90 汽车变速箱后面孔系钻削组合机床设计 28毕业设计 D180柴油机12孔攻丝机床及夹具设计 29毕业设计 C616型普通车床改造为经济型数控车床 30毕业设计（论文）说明书 中单链型刮板输送机设计 液压类毕业设计1毕业设计 ZFS1600/12/26型液压支架掩护梁设计2毕业设计 液压拉力器 3毕业设计 液压台虎钳设计 4毕业设计论文 双活塞液压浆体泵液力缸设计 5毕业设计 GKZ高空作业车液压和电气控制系统设计 数控加工类毕业设计1课程设计 设计低速级斜齿轮零件的机械加工工艺规程 2毕业设计 普通车床经济型数控改造 3毕业论文 钩尾框夹具设计（镗φ92孔的两道工序的专用夹具） 。
4 机械制造工艺学课程设计 设计“拨叉”零件的机械加工工艺规程及工艺装备（年产量5000件）5课程设计 四工位专用机床传动机构设计 6课程设计说明书 设计“推动架”零件的机械加工工艺及工艺设备 7机械制造技术基础课程设计 制定CA6140车床法兰盘的加工工艺，设计钻4*φ9mm孔的钻床夹具 8械制造技术基础课程设计 设计“CA6140车床拨叉”零件的机械加工工艺及工艺设备 9毕业设计 轴类零件设计 10毕业设计 壳体零件机械加工工艺规程制订及第工序工艺装备设计 11毕业设计 单拐曲轴零件机械加工规程设计说明书 12机械制造课程设计 机床传动齿轮的工艺规程设计（大批量） 13课程设计 轴零件的机械加工工艺规程制定 14毕业论文 开放式CNC(Computer Numerical Control)系统设计15毕业设计 单拐曲轴工艺流程 16毕业设计 壳体机械加工工艺规程 17毕业设计 连杆机械加工工艺规程 18毕业设计（论文） 子程序在冲孔模生产中的运用——编制数控加工（1#-6#）标模点孔的程序 19毕业设计 XKA5032A/C数控立式升降台铣床自动换刀装置的设计 20机械制造技术基础课程设计 设计“减速器传动轴”零件的机械加工工艺规程（年产量为5000件） 21课程设计 杠杆的加工 22毕业设计 2SA3.1多回转电动执行机构箱体加工工艺规程及工艺装备设计 23毕业论文 数控铣高级工零件工艺设计及程序编制 24毕业论文 数控铣高级工心型零件工艺设计及程序编制25毕业设计 连杆的加工工艺及其断面铣夹具设计 26机械制造工艺学课程设计说明书：设计“CA6140车床拨叉”零件的机械加工工艺及工艺设备 杂合XKA5032AC数控立式升降台铣床自动换刀装置设计机用虎钳课程设计.rar行星齿轮减速器减速器的虚拟设计（王少华）.rar物流液压升降台的设计自动加料机控制系统.rar全向轮机构及其控制设计.rar齿轮齿条转向器.rar出租车计价系统.rar（毕业设计）油封骨架冲压模具连杆孔研磨装置设计 .rar蜗轮蜗杆传动.rar用单片机实现温度远程显示.doc基于Alter的EP1C6Q240C8的红外遥器（毕业论文）.doc变频器 调试设计及应用镍氢电池充电器的设计.doc铣断夹具设计J45-6.3型双动拉伸压力机的设计WY型滚动轴承压装机设计Z32K型摇臂钻床变速箱的改进设计基于PLC高速全自动包装机的控制系统应用基于单片机控制的步进电机调速系统的设计普通-式双柱汽车举升机设计无模压力成形机设计（word+CAD）手机恒流充电器的设计3 摘要.doc智能型充电器的电源和显示的设计气动通用上下料机械手的设计同轴2级减速器设计行星齿轮减速器减速器的虚拟设计（王少华）运送铝活塞铸造毛坯机械手设计_王强CA6140车床后托架加工工艺及夹具设计SSCK20A数控车床主轴和箱体加工编程织机导板零件数控加工工艺与工装设计密封垫片冲裁模设计瓶盖拉深模的设计手机塑料外壳注塑模毕业设计五 OO:348414338。
6.毕业论文英文摘要翻译
Today, for any enterprise, rationalization and automation and flexibility are vital factor, only each process and control, and straighten out the use of advanced logistics method and automation system can solve this problem is the demand in the fierce competition in the decisive factor of advantage.
Modern industry is the development trend of informatization, automation, network, intelligent, flexibility, especially China has joined the WTO, the development of modern science and technology and the accelerated pace of global economic integration, it is required in our industrial automation
7.跪求：3000字左右机械文章中英文对照（毕业设计论文翻译）在线等
Grassland Ecology and Mongolian civil environmental knowledge.（题目）Grassland ecological zone, mainly in the western plains from the northeast, the Inner Mongolia Plateau, the Ordos Plateau, the Loess Plateau, Qinghai-Tibet Plateau, west of the southern edge of the front line, that is, from latitude 51 ° to 28 ° of a broad range stretching 4500 kilometers, accounting for the National Land area of 29%. Mainly distributed in Heilongjiang, Jilin, Liaoning, Inner Mongolia, Ningxia, Gansu, Qinghai, Xinjiang, Tibet and Sichuan provinces and regions inhabited by 10 ethnic minorities, basically constituted from the northeast to the southwest of the half-moon with livestock.In these regions of the 43 ethnic minorities live, there are 19 ethnic groups to engage in animal husbandry, the main representative of the nation has Mongolia, part of the Ewenki and Daur, Kazakhstan, Yugur, Tajik, Kirgiz, Tatar, Tibetan, etc..For the Earth's land area accounted for 47% of the grassland and its ecosystem research has been of concern for people. According to the World Resources Report, 3000-4000 pasture to feed a million nomadic populations and provide a lot of food information, however, due to overgrazing, pasture land, short-term behavior of the policies and grab the most profitable pure economic sense, leading to emergence of grassland desertification and grassland degradation trends. Many experts and steppe grassland study the implementation of the program, and in the world especially in developing countries, study, fully understands the different economic, social and cultural factors that lead to the utilization of the grassland is changing and improving technology are pasture problem is also complicated social problems.According to United Nations Food and Agriculture regarding plant forage research that: "Due to a series of economic, social, political, religious factors, making further expansion of cultivation area of forage is limited. Engaged in the FAO Grassland and fodder crops development in most countries These factors are complex. The work of the future development depends on the rural sociologist or a politician for the cultivation of grass created by the economic and social environmental conditions.World Resources Report, the Indian subcontinent are the deterioration of pastures and overgrazing, drought and mismanagement caused by introduced pastures in recent years, development plans have achieved good results. In sub-Saharan Africa and rangeland management and livestock development, the sector investment, aid mostly ended in failure, it was felt necessary to develop the process of the people take part in local, needs and the local social structure, cultural traditions combine.This understanding of the changes in grassland research for new ideas. However, the current study of grassland ecosystems, from sociology, anthropology perspective on the report of the study are rare. In World Resources Report, in reference to China Ranch situation that 41% of the total land used for grazing, 25% of the grassland degradation, the trend for the risk of soil erosion is accelerated, the loss of productivity, desertification, degradation is faster than regeneration; When talking about the report and the reasons for that:(1) population pressure; (2) 27% of the desertification caused by overgrazing; (3) 50s light agriculture, animal husbandry; (4) the existing sparse and good grassland reclamation for farmland; (5) Urban development has increased the pressure on existing grassland; (6) groups of grazing; (7) of grass and forage crops mismanagement. In fact all of these reasons are related to human factors.States there are about four million square kilometers of grassland area, all over the world accounted for 13.9 percent of grassland, accounting for China's land area of 41.67%, grazing area of third place in the world, second only to Australia and the former Soviet Union. China's pastoral areas should be divided into two regions, the North "nomadic" District and the South "Agriculture" zone, from the Northeast Plain to the Qinghai-Tibet Plateau, the mountains from Hainan to the Yellow Sea, there are grassland distribution, which are the largest area of grassland in Inner Mongolia temperate grassland.However, due to a variety of complex reasons, the use of not only the construction of grassland, my lawn is not only less productive but has 30% of the grass at different levels of degradation Medium. Long-term grassland study did not draw attention, not the 50's before a grasslands national research institutions, the 50's and began farming in the schools in training IT personnel 。
8.求毕业设计英文翻译
work for a specified time after the performance appraisal, but also to try to be the targets of life: hydraulic components detection device hydraulic system design, Hydraulic Components detection device hydraulic system hydraulic components of the type design, hydraulic components of the structural design, the environment pressure and adapt to the changes in the ability to conduct an effective test. This integrated detection device designed mainly include Hydraulic Test is to use hydraulic test equipment for hydraulic components and hydraulic systems for the testing and performance evaluation. So hydraulic experiment in the production of hydraulic components play an important role in the hydraulic components detection devices, Not only can the test be targeted at rated conditions, and research and analysis design a set of complete functions to detect pump-motor-cylinder power recovery of non-integrated detection device and the AUTO ACD painted on the chart, and several other aspects. This paper studies pump-motor-cylinder independent detection device, hydraulic components of the pilot project and test methods。
9.求毕业论文的英文摘要
The filling pile department is refers to, in the project scene through the mechanical drill hole, the steel pipe pushes methods and so on earth or manpower excavation forms the pile hole in the foundation soil, and lays aside the pile which in among them the reinforcing cage, the irrigation concretes make, according to becomes the hole method to be different, the filling pile may divide into the settling tube filling pile, the drill hole filling pile and digs the hole filling pile and so on several kinds. Drills a hole the filling pile is according to becomes one kind of pile which the pile method classification defines. The filling pile earliest more than 100 year ago in 1893, because of the industry development as well as the population growth, the high-rise construction increased unceasingly, but because many city's ground conditions were quite bad, could not withstand the pressure which directly transmitted by the high-rise construction, the surface following has the thickness very big soft soil or the medium intensity clay level, the construction high-rise construction like still continued to use the friction pile which at that time used in common, had the very big subsidence inevitably. Therefore engineers used for reference have dug a well the technical invention to dig in the hole to construct the reinforced concrete artificially to become the pile. Therefore afterward 50 years later, namely developed in the early-1940s along with the high efficiency drill hole machines and tools first is published successfully in the US, after World War II, the world was specially the European and American developed country economic resurgence and the development, at this point, changes with each new day along with the science and technology the development, drilled a hole the filling pile in high-level, in the ultrahigh layer building and the heavy construction is widely applied. Certainly, in our country, drilled a hole the filling pile design and the construction level also obtained the considerable development.。
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