r.m.s. (root mean square) value 均方根值，有效值r.m.s. value in alternating current 交流电的有效值race 环，圈raceway 电线槽，电缆索道rack 小齿轮rack and pinion 齿轮齿条rack and pinion lift 齿轮齿条电梯rad (radian) 弧度rad (radio) 无线电rad (radius) 半径radiator 散热器radio interference 无线电干扰radio interference suppression 抗无线电干扰保护radio paging 无线电传呼radio-screening 无线电屏蔽radio-shielding 无线电屏蔽radio-shielding unit 无线电屏蔽装置radio-wave detector 无线电监测装置radius of curvature 曲率半径rail 导轨rail backing 导轨垫rail brackets 导轨支架rail clip 导轨压道板rail gauge 校道尺，安装导轨量具rail gib 导轨衬垫rail joint 导轨接头rail lubricate device 导轨润滑装置rail lubricator 导轨油盒rail support 导轨支架railroad track 铁轨raising valve 提升阀ram 柱基（液压阀）RAM (random access memory) 随机存储器ramp 倾斜电梯ramp rate （速度曲线）光滑度，斜坡度ramp to stop 减速停车random sample 随机抽样range 范围rapair 修理rasper 锉刀ratchet 棘轮ratchet and pawl 棘轮和棘爪ratchet mechanism 棘轮机构ratchet wheel 棘轮rate 比率，比值rate of acceleration change 加速度变化率rate of adaptation 匹配速度rate of change 变化率rate of charges 计费标准rate of interest 利率rated capacity 额定载重量rated exciting current 额定励磁电流rated insulation voltage 额定绝缘电压rated load 额定载重量rated output 额定输出rated secondary current 额定定子电流rated speed of escalator 自动扶梯额定速度rated speed of lift 电梯额定速度rated voltage 额定电压rating 额定值ratio 比，比率rationalization 合理化RC( reinforced concrete) 钢筋混凝土RC( resistive capacitive) network 阻容网络RC-component 阻容元件RC-unit 阻容单元RD (resistor-diode) component 电阻二极管，RD元件reactance 电抗reactor 电抗reactor box 电抗器箱reactor winding 电抗器线圈read off 读取readiness travel 准备运行reading 读数real time 实时，实际时间real-system software 有效系统的软件real-time 实时，实际时间real-time base 实时基准，实时坐标reamer 绞刀reamer bolt 铰配螺栓，密配合螺栓rear entrance 后部入口rear mounted 装在后背面的rear opening 后开门，贯通门rear side 后侧rear wall 后壁rebound stroke 回弹冲柱recall button 重呼按钮recall floor 召回楼层recall operation 召回操作recall travel 召回运行receiving box 配电箱receiving panel 配电盘receptacle （电源）插孔，插座receptacle socket 接受孔插座reception unit 接收装置recess 凹口，凹入recessed mounting 凹入式安装record 记录rectangle 矩形，直角rectifier 整流器rectifier fed electric drive 整流器供电直流拖动rectifying unit 整流单元reduced buffer stroke 缓冲器缩短冲柱reduction gear 减速齿轮装置reduction ratio 减速比reed relay 舌簧继电器reel 卷绕，卷轴reel off 退绕refer 参考，引用reference diode 稳压二极管reference installation 基准设施reference triping speed 标准触发速度reference value 参照值，标准值reference value generator 参照值发生器，标准值发生器reference value interval time 参照值间隔时间reference value model 参照值图样reference-actual comparison 标准值实际值的比较reference-actual value comparison 标准值实际值的比较refit 重装reflection light barrier 反射式光电管refurbish 电梯大修regenerate to supply mains 回馈到电源regenerated power 再生电源regenerating condition 再生装置，回馈状态regenerative (regen.) 回馈，再生regenerative brake 回馈，再生控制register 登录器，登录卡registered call 登录的呼梯指令registration 记录，登录regrlate 调节regular lay 交互捻（绳）regulating unit 调节装置regulation 调节，调节率regulation parameter 调节参数regulation pcb 调节印数电路板regulations 规定，章程，法令，条例regulator 调节器regulator gasket 调节垫片reimbursement of expense 费用偿还reinforced 加强的reinforced concrete 钢筋混凝土re-insert 重新插入related 相关的relay 继电器relay control 继电器控制 relay logic 继电器逻辑，继电器控制 release 释放，解除 release delay 释放延时 release of service 服务通告 release voltage 释放电压 releasing brake handle 制动器松开扳手 relevel 再平层 re-leveling device 重平层装置 reliability 可靠性 relief valve 安全阀 remanence 剩磁 remedy 补修 remote 远程的，远距离的 remote monitoring 远距离监控，遥测 remote station 遥控站 renewal 更新renovation 更新改造rentable area 可租用面积REP (receiving electricity panel) 配电盘replace parts 替换件，代用件replacement 更换，取代replacement by guarantee 保用范围replacement part 替换件，备品备件report 报告request delivery date 要求交货日期rescue 救援reserve 储备，备用reserve information 预约信息reservoir (hydra.) 油箱（液压装置）reset 复位，清零，置零residential area 住宅区residential building 住宅楼residential district 住宅区residential lift 住宅电梯residual 剩余，剩磁residual flux 剩磁resistance 电阻，反抗，阻力resistance box 电阻盒resistant to impact 耐冲击resistant to shock 耐冲击resistant to wear 耐磨损resistor 电阻resistor box 电阻盒resistor network (integrated) （集成）电阻电路resistor tube 电阻管resistor-diode (RD) component 电阻二极管元件resolving accuracy 分辨精度resolving effect 分辨能力resonance 谐振response 应答，反作用力response time 应答时间rest schedule 停止程序，停止计划restoring moment 恢复力矩restriction 节流，阻尼resultant vector 合成矢量retainer 护圈，挡板，隔环retainer clip 钢丝绳夹头retaining ring 弹簧挡圈，挡圈retard coil 减速分流线圈retiring cam 伸缩式碰铁，活动门刀retractable 可伸缩的，可折叠的retractable cam 伸缩式碰铁，活动门刀retrieval o