This series use four-column frame structure, which is easy to be maintained.
该系列产品采用了四立柱框架式结构，维修方便；
For the product XML column, we will create those four indexes.
对于产品xml列，将创建这四个索引。
Each column can accommodate up to four tabs.
每个竖列最多放置四个标签页。
Each column can accommodate up to four tabs.
每个竖列最多放置四个标签页。
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