具有如下特点：科技管理权力集中；
The power of the scientific and technological management is centralism.
它具有如下特点：(1)使用了铬酸盐洗脱液。
It has the following characteristics 1. Chromate eluant is used.
通过模拟，验证了具有如下特点的残余曲线图，能够使塔顶产品浓度高于溶剂浓度。
We proved that the residual curve which had the following properties could make the product concentration higher than the solvent concentration through simulating.
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