单作用双作用英语

不好意思，文献没有。。只有这些词汇。液压专业英语词汇acceptable conditions许用工况actual conditions实际工况actual force实际输出力air contamination空气污染air consumption耗气量air conditioner unit空气处理单元air filter空气过滤器adjustable restrictive valve可调节流阀amplifier放大器amplitude ratio幅值比analogue amplifier模拟放大器anti-corrosive quality抗腐蚀性automatic cycle自动循环axial piston pump轴向柱塞泵back pressure背压bladder accumulator气囊式蓄能器bleed line放气管路bonded washer组合垫圈breakout pressure启动压力butterfly valve蝶阀cartridge valve插装阀cavitation气穴charge pressure充油压力check valve单向阀circle循环circuit diagram回路图clamper管卡closed circuit闭式回路collapse pressure压溃压力compensator避震喉composite seal复合密封件continuous working conditions连续工况control of pump泵的控制control console操作台control panel控制屏cooler冷却器counterbalance valve平衡阀cracking pressure开启压力cushioning缓冲cylinder缸cycling speed循环速度De-energizing of solenoid 电磁铁释放density密度diaphragm valve膜片阀differential circuit差动回路differential cylinder差动缸differential pressure instrument压差计digital amplifier数字放大器direction of rotation旋转方向directly operated type直动式displacement排量dither颤振double-acting cylinder双作用缸Double throttle check valve 双单向节流阀drain line泄油管路drift漂移drive shaft coupling联轴器dwell phase停止工步duplex filter双筒过滤器efficiency效率effective filtration area有效过滤面积elastomer seal弹性密封件elbow弯头electrical pressure transducer压力传感器external leakage外泄漏extend stroke外伸行程filter pressure drop过滤器压降fitting；connection接头fixed restrictive valve固定节流阀flared fitting扩口式接头flash point闪点flexible hose软管flange connection法兰接头flange mounting法兰安装flow-combining valve集流阀flow control valve流量控制阀flow control circuit调速回路flow divider valve分流阀flow gain流量增益flow limit流量极限flow line管路flow meter流量计flow pass流道flow rate流量Flow valve 流量阀flower factor流量系数foot mounting底座安装force输出力four-way valve四通阀free position自由位frequency response频率响应function diagram功能图gate valve闸阀gear pump齿轮泵global(ball) valve球阀graphical symbol图形符号heat exchanger热交换器heater加热器hydraulic lock液压锁紧hydraulic motor液压马达hydraulic power流体传动hydraulics液压技术hydrodynamics液力技术hydropneumatics气液技术hysteresis滞环hydraulic amplifier液压放大器hydraulic controlled type液控式instantaneous conditions瞬态工况internal leakage内泄漏inlet pressure进口压力induced pressure负载压力kinematic viscosity运动粘度laminar flow层流lap遮盖leakage泄漏limited conditions极限工况linearity线性度linear region线性区liquid contamination液体污染liquid level measuring instrument液位计lubricator油雾气manually operated type手动式manifold block油路块mechanically controlled type机械控制式mechanical seal机械密封meter-in circuit进口节流回路meter-out circuit出口节流回路Manifold block 集成块needle valve针阀neutral position中位nitrile butadiene rubber；NBR丁腈橡胶noise level噪声等级nominal filtration rating公称过滤精度nominal pressure公称压力nozzle flapper喷嘴挡板null bias零偏null drift零漂null(quiescent) leakage零位内泄漏one-way restrictive valve单向节流阀opening开口open circuit开式回路operating conditions运行工况operating pressure运行压力outlet pressure出口压力over lap正遮盖override pressure调压偏差override control优先控制packing seal填料密封peak pressure峰值压力phase工步phase lag相位移Pilot valve 先导阀pilot pressure控制压力pilot-controlled check valve液控单向阀pilot-operated type先导式Pilot operated check valve 液控单向阀piston pump柱塞泵pilot line控制管路pipe-work管路布置piston seal活塞密封polytetrafluoroethene；PTFE聚四氟乙烯poppet valve锥阀portable particle counter便携式颗粒检测仪port油口Position feedback 位置反馈power station液压泵站pre-charge pressure充气压力pressure control circuit压力控制回路pressure drop；differential pressure压降pressure gauge压力表Pressure relief valve 压力溢流阀pressure switch压力开关pressure time diagram压力－时间图pressure relief valve压力控制阀pressure relief valve溢流阀pressure reducing valve减压阀Progressive flow 渐增流量Proportional valve 比例阀proof pressure耐压试验压力pulse generator脉冲发生器quick release coupling快换接头radial seal径向密封rapid advance phase快进工步rapid return phase快退工步rated conditions额定工况rated flow额定流量rated pressure额定压力rear end无杆端Rectifier plate 节流板reducer fitting异径接头replenishing line补液管路reservoir fluid capacity油箱容量resolution分辨率retract stroke内缩行程return line回油管路repeat ability重复性reproducibility复现性rigid tube硬管ripple波动rod end有杆端rod seal活塞杆密封rotary seal旋转密封Rotary knob 旋钮rust protection防锈性safety circuit安全回路sandwich valve叠加阀Sandwich plate valve 叠加阀sealed reservoir闭式油箱sensor传感器sequence valve顺序阀servo-valve伺服阀shut-off valve截止阀shuttle valve梭阀silencer消声器single-acting cylinder单作用缸slide valve滑阀solid contamination固体颗粒污染Solenoid valve 电磁阀speed regulator valve调速阀static pressure静压力sticking液压卡紧steady-state conditions稳态工况stiffness刚度sub-plate底板sub-plate valve板式阀Sub-plate mount 板式安装suction pressure吸入压力supply flow供给流量surge pressure冲击压力system pressure系统压力symbols for hydraulic and pneumatic components液压气动元件图形符号symbols for fluid logic devices流体逻辑元件图形符号symbols for logic functions逻辑功能图形符号symmetry对称度synchronizing circuit同步回路telescopic cylinder伸缩缸thermostat温度控制器threshold阈值Throttle valve 节流阀transfer function传递函数turbulent flow紊流under lap负遮盖unloading valve卸荷阀valve阀valve element阀芯valve element position阀芯位置variable displacement pump变量泵valve pressure drop阀压降valve polarity阀极性viscosity粘度 water content含水量welded fitting焊接式接头 wiper seal；scraper防尘圈密封working cycle工作循环 working pressure工作压力working phase工作工步 working stroke工作行程working line工作管路 vane pump叶片泵zero position零位 zero lap零遮盖一． 阀类分流阀 flow divider valve 截止阀 shut-off valve球阀 global(ball) valve 针阀 needle valve闸阀 gate valve 膜片阀 diaphragm valve蝶阀 butterfly valve 阀 valve底板 sub-plate 油路块 manifold block 板式阀 sub-plate valve 叠加阀 sandwich valve 插装阀 cartridge valve 滑阀 slide valve 锥阀 poppet valve 阀芯 valve element 阀芯位置 valve element position单向阀 check valve液控单向阀 pilot-controlled check valve梭阀 shuttle valve压力控制阀 pressure relief valve溢流阀 pressure relief valve顺序阀 sequence valve减压阀 pressure reducing valve平衡阀 counterbalance valve卸荷阀 unloading valve流量控制阀 flow control valve方向控制阀（directional valve）液压辅件（accessory）普通阀（common valve）Solenoid valve 电磁阀Check valve 单向阀Cartridge valve 插装阀Sandwich plate valve 叠加阀Pilot valve 先导阀Pilot operated check valve 液控单向阀Sub-plate mount 板式安装Manifold block 集成块Rotary knob 旋钮Rectifier plate 节流板Servo valve 伺服阀Proportional valve 比例阀Position feedback 位置反馈Progressive flow 渐增流量De-energizing of solenoid 电磁铁释放固定节流阀 fixed restrictive valve可调节流阀 adjustable restrictive valve单向节流阀 one-way restrictive valve调速阀 speed regulator valve分流阀 flow divider valve集流阀 flow-combining valveDDV-direct drive valve 直动式伺服阀二、介质类Phosphate ester (HFD-R) 磷酸甘油酯 Water-glycol (HFC) 水-乙二醇Emulsion 乳化液 Inhibitor缓蚀剂 Synthetic lubricating oil 合成油三、液压安装工程Abrasion 摩擦 Argon 氩气 Butt welding 对接焊Contamination 污染 Creep爬行 Dipping process 槽式酸洗Extension （活塞杆）缩回 Failure 失效Flushing 冲洗 Grout 灌浆 Inert gas welding 惰性气体焊Jog 点动 Malfunction 误动作 Nitric acid 柠檬酸Passivity 钝化 Pickling 酸洗 Retract（活塞杆）伸出Re-circulation 循环 Socket welding 套管焊四、管接头Adjustable fittings/swivel nut 旋转接头Banjo fittings 铰接式管接头Bite type fittings 卡套式管接头Bulkhead fittings 长直通管接头Female connector fittings 接头螺母Mal stud fittings 端直通管接头Reducers extenders 变径管接头Tube to tube fittings 接管接头union 直通接管接头union elbow 直角管接头union tee 三通管接头union cross 四通管接头Weld fittings 焊接式管接头五、伺服阀及伺服系统性能参数Dynamic response 动态频响DDV-direct drive valve 直动式伺服阀NFPA-National Fluid Power Association 美国流体控制学会Phase lag 相位滞后Nozzle flapper valve 喷嘴挡板阀Servo-jet pilot valve 射流管阀 Dither 颤振电流Coil impedance 线圈阻抗Flow saturation 流量饱和Linearity 线形度 Symmetry 对称性Hysterics 滞环 Threshold 灵敏度Lap 滞后Pressure gain 压力增益Null 零位Null bias 零偏Null shift 零飘Frequency response 频率响应Slope 曲线斜坡祝你取得好成绩！

你好 have to do 不得不做某事，to 为不定式，后接动词原形。 例：He has to wash his clothes this afternoon.have/make/let sb/sth do 让某人或某物做某事， have 为使役动词，后接动词原形。 例：Our teacher often has/makes/lets us do much homework. They always have the monkeys play with balls. 注意：在被动语态中，要改为to do 形式。 例：He is often made to cook supper.have sth done 请或让某人（别人）做某事 例： The king had his tomb built . I have already had my TV set repaired .至于have sth to do，英语中没有这种用法。祝你进步！ 16

“上表演课”有很多的说法，要看你在什么情况下说。虽然“表演”就是acting／performance或者是drama，“课”可以用class或者lessons，可是在这里的“上”有很多的意思。比如：我正在上表演课。-->iamhavingactingclassatthemoment.我打算上表演课。-->iamplanningtostart（或者用take也可以）dramalessons.我喜欢上表演课。-->ilikemyactingclass.等等。我自己比较喜欢用“dramalessons”听起来最自然。