介绍了SDH传输系统主要告警维护信号，描述了告警维护信号的含义和故障产生原因。
The major alarm maintenance signal of SDH transmission system are introduced and its implication and failure reason are described.
这项报告警告到，骨质脆弱和骨质疏松是引发骨折的主要原因，现在已经上升到了公共卫生健康的重要议题程度。
The report warns that fractures caused by weakened bones and osteoporosis are now a 'major public health concern'.
本文主要介绍了通信子系统以及告警子系统。
This article primarily introduced the correspondence subsystem and alarm subsystem.
应用推荐