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求两篇英文文献下载,1、Preparation of silica aerogel from oil shale ash

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求两篇英文文献下载,
1、Preparation of silica aerogel from oil shale ash by fluidized bed drying
2、The action of lubricants under extreme pressure conditions in a modified four-ball tester
第一个已经下载了,求助这篇下载2、The action of lubricants under extreme pressure conditions in a modified four-ball tester
求两篇英文文献下载,1、Preparation of silica aerogel from oil shale ash
   今天我一个有权限,明天方可下第二个.
再问: 好,非常感谢