... 阶数,阶 order 阶式合成 order-type synthesis 普通齿轮系 ordinary gear train ...
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It is necessary that the technical development of direct synthesis of titanium-containing zeolite using cheap raw materials and secondary synthesis of this type zeolite, in order to take it...
为实现钛硅沸石的工业化,应重视开发用廉价原料的直接合成和间接合成技术。
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