shutdownn.关机；停工shutdown hours用电切断时shutdown relay断路继电器shutdown phase停工阶段shutdown switch断路开关,停车开关,停止开关shutdown handle停车手柄shutdown system停车系统,关闭系统,停机系统shutdown cooler停堆冷却器shutdown option关闭选项shutdown device止动设备,止动装置shutdown period停工期