Moreover, the ACCESS database features simple operation and maintenance requirements, it is an ideal option of the back stage database for mini-network application system.
同时ACCESS数据库操作简便，维护简单，是小型网络应用系统后台数据库很好的选择。
ZK3-6/250 single stage drive electrical locomotive adopts step speed adjustment with the characteristics of easy operation, simple structure, reliable running and easy maintenance etc.
ZK3-6/250单级传动电机车采用有级调速，其特点为操作简单方便、结构简单、运行可靠、维护方便等。
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