Backing up key files is about a combination of identifying the files and finding a suitable method for storing and backing up that information.
备份关键文件涉及到确定相关文件，并找到一种合适的方法存储和备份这些信息。
Used either solely as Rough Pumps, or in combination with other high vacuum pumps as Backing Pumps.
可单独作低真空泵用，也可与其他高真空泵组合作前级泵用；
Used either solely as Rough Pumps, or in combination with other high vacuum pumps as Backing Pumps.
可单独作低真空泵用，也可与其他高真空泵组合作前级泵用；
应用推荐