Because network backup systems can backup so many computers, they normally utilize tape auto-changer to give them greater storage capacity.
因为网络备份系统，可用于备份这么多的电脑，他们通常利用胶带。
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Auto changing tool magazine: Equipped with chain-type tool changer for automatic exchanging tools. Ahe performance of changing cut has been strictly tested, acting concertedly, fast and reliably.