SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING UNIT SEVEN HYDRAULIC TRANSMISSION hydraulic液力的 LESSON ONE INTRODUCTION transmission传动 For many years a hydraulic system was plumbing considered the result of plumbing together a 管件总称 number of components. Also, a hydrauliccomponent system has been considered merely the source组成部分 of power for control servos. Each of these servo faHE concepts can lead to basic errors. Following伺服系统 either of these guide lines can result in inadequate systems, which are inadequate, unstable, or a 不充足的 combination of the two unstable不稳定的SCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING UNIT SEVEN HYDRAULIC TRANSMISSION LESSON ONE INTRODUCTION For many years a hydraulic system was considered the result of plumbing together a number of components. Also, a hydraulic system has been considered merely the source of power for control servos. Each of these concepts can lead to basic errors. Following either of these guide lines can result in systems, which are inadequate, unstable, or a combination of the two. hydraulic 液力的 transmission 传动 plumbing 管件总称 component 组成部分 servo 伺服 伺服系统 inadequate 不充足的 unstable 不稳定的