For example, almost all legacy computer systems need some form of design investigation, if for no other reason than to train new developers in the maintenance and extension of the system.
例如，如果是仅仅出于就系统的维护和扩展培训新开发人员，则几乎所有的遗留计算机系统都需要某种形式的设计研究。
The major alarm maintenance signal of SDH transmission system are introduced and its implication and failure reason are described.
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。
Based on analyzing the common fault of belt conveyor system, the reason of the fault was found out. The settlement from design, installation, maintenance and producing management was put forward.
通过对带式输送机常见故障的分析，找出产生故障的主要因素，进而从设计、安装、维护及生产管理等方面提出处理措施。
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