更复杂的程序可能使用操作系统信号和简单网络管理协议（Simple Network Management Protocol，SNMP）管理可用性。
Programs that are more sophisticated might use operating system signals and Simple Network Management Protocol (SNMP) to manage availability.
用于服务器，存储器和存储系统中的铅，用于交换，信号和传输，以及电信网络管理的网络基础设施设备中焊料中的铅。
Lead in solders for servers, storage and storage array systems, network infrastructure equipment for switching, signalling, transmission as well as network management for telecommunication.
其硬件部分主要由六个模块组成：信号调理模块、时间校对模块、存储器模块、网络控制模块、WDT模块和电源管理模块。
The hardware mainly comprises six modules: signal procession module, time adjusting module, memorizer module, network control module, WDT module and power management module.
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