附件24.2 machine equipment 6)Because of standardization,eries,and all-purpose application,the hydraulic system iseasier in design. 7)The hydraulic system iseaser than machine equipment in dongine motion 2.The disadvantages of hydraulic transmission 1)Leak.Oil Leaks are inevitable because of the loss in fluid flow resistance.So more energy lose exists in a hydraulic transmission. 2 Working temperature 4)It is difficult to find the reasons of fault. l.5 The Development History and Application of Hydraulic and Pneumatic Technology(液压与气压传 动发展及应用概况) 国 1.5 The Development History and Applications of ission follows.(3 stages The 17th century and the early 18th century -a productive period in the development of hydraulic theory The 18th century-This principle was first adopted.The first hydraulic pressure machine was manufactured m Britain late in the The 19th century until now-has a great application in The details can be referred in your textbook. The applications following: 痛 Table.1-1 Examples of Application of Hydraulic and Pneumatic Transmission Technc ogy in Industries Charge,digger,elevator.support etc Architecture machi Pile driver,jack,flat machine ete tallur gy mac中 fabrkcation 3- Light industries od 中 Water iagtetniehanetH,uaa,amiae Now we would like to repeat the chapter I mentioned above.附件 24.2 machine equipment. 6) Because of standardization, series, and all-purpose application; the hydraulic system is easier in design, fabrication and application. 7) The hydraulic system is easier than machine equipment in doing line motion. 2. The disadvantages of hydraulic transmission 1）Leak.Oil Leaks are inevitable because of the loss in fluid flow resistance. So more energy lose exists in a hydraulic transmission. 2）Working temperature. 3）Cost.The cost is high because of the needs in high precision fabricate for hydraulic elements. 4) It is difficult to find the reasons of fault. 1.5 The Development History and Application of Hydraulic and Pneumatic Technology （液压与气压传 动发展及应用概况） The applications following: Now we would like to repeat the chapter 1 mentioned above. 7