词汇	排空时间
释义	排空时间医emptying time
随便看	operational voice communication operational voice communication office operational voice communications subsystem Operational Voice Communications System Operational Voice Recording Subsystem Operational Voice System operational voltage operational waste operational wastes operational water level operational weapon satellite operational weather category operational weather limit operational weather limits Operational Weather Report operational weather teletype network operational weight of equipment operational word operational work operational wound Operational WWW Systems Evaluation operational zone operation amount operation amplifier operation-amplifier