较大型的单元大多采用电池、飞轮、柴油电机或三者的组合作为备份电源。
Most of the larger units use batteries, flywheels, diesel generators, or a combination of the three, acting as a backup power source during power quality or utility disturbances.
以前也许有一些可供选择的备份软件，但LTech似乎是首个与Google官方合作的同类软件提供商。
There have been options before to backup your Docs, but LTech seems to be the first official enterprise partner of Google to offer such a software package.
文章在介绍网络备份新观念的基础上，结合作者所在单位已经实施的网络数据备份工作，阐述了网络系统对备份的要求及备份方案的设计工作。
This paper introduces the new concept of the network data backup, and describes both the demand of the network system for the backup and the design of the scheme.
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