The last style should be amended to the final column in any series.
last样式应该应用于任何序列的最后一列。
The optimization design of column hardware series falls behind that of the process and control.
塔器硬件系列优化设计相对落后于工艺和控制的优化设计。
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；
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；
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