system oil大型船用十字头柴油机轴承润滑油systemn.系统；体系；身体；制度systeminc acquired resistance系统获得性抗性system structure of muhilayer多层体系结构system on a programmable chip片上可编程系统System of agency by estoppels表见代理制度System Communication Pamphlet系统通信手册system differential equations微分方程系统systema nervosum periphericum周围神经系,周围神经系统system-wide OA construction全路OA建设system of collective security集体安全制度system of coinddence theorems重合点组定理