题名 | 27Al and 29Si MAS-NMR study of the MCM-22 zeolite modified by steam and alkaline treatments |
链接 | http://www.sciencedirect.com/science/article/pii/S0167299108800432 |
本帖最后由 yanghai811228 于 2013-10-15 19:48 编辑
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