Metadata – Since there is a mapping between logical and physical location, the storage metadata and its management becomes key to a working reliable system.
元数据——由于有着逻辑与物理位置之间的映射关系，因此对于一个运行的可靠系统来说存储元数据的管理显得极为关键。
This product has logical structure, reliable seal, excellent performance and nice design.
产品结构合理、密封可靠、性能优良、造型美观；
Its biggest advanced and logical structure, reliable sealing performance, convenient dismantling and repair, stable operation, low noise and long lift.
它的最大优点是结构先进合理、密封性能严密可靠、拆卸检修方便、工作稳定、噪声低、使用寿命长。
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