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Method for preparing graphene-coated metal nanoparticle catalyst for use as proton exchange membrane fuel battery catalyst , involves taking sources, followed by mixing, stirring, mixing, washing, filtering, drying and heating. 专利
申请日期: 2015-01-01, 公开日期: 2015-10-21
作者:  LI G CHENG G LIU C
收藏  |  浏览/下载:2/0  |  提交时间:2019/12/09
Making small-grain iron exchange zeolite molecular sieve involves dissolving iron source into deionized water, dripping iron source solution into silicon source, forming sol, dissolving sources into water and transferring gel into kettle. 专利
申请日期: 2012-01-01, 公开日期: 2012-10-24
作者:  AN Y JI M YANG Y
收藏  |  浏览/下载:3/0  |  提交时间:2019/12/18
Compensating optical fibre sensor - using two light beams from two light sources in turn, going into sensor from front and back directions. 专利
申请日期: 1992-01-01, 公开日期: 1992-04-01
作者:  FANG X WANG A LIN J
收藏  |  浏览/下载:2/0  |  提交时间:2020/01/06


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