Pennsylvania Railroad宾州铁路公司 Program Readiness Review项目准备审核 Problem Reporting and Resolution (quality management)问题报告和分辨率(质量管理) Priority Round Robin优先级圆知更鸟 Primary Reference Receiver (Datum)主要参考接收器(数据) Policy Research Report (Worldbank)研究报告(Worldbank)的政策 Product Review Report产品审核报告 Prison Release ReoffenderReoffender监狱释放 Production Readiness Review生产准备审核 Personnel Requirements Report人员要求的报告 Pressure Regulator压力调节器 Pulse Repetition Rate脉冲重复频率 Pseudo Response Regulator (cell physiology)伪响应调节器(细胞生理学) Passenger Reservation Request旅客预订要求 Production Revision Request修改请求。生产