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Cast austempered ductile iron for engine crankshaft, is prepared by controlled casting cooling processing of ductile iron comprising carbon, silicon, manganese, molybdenum, nickel, phosphorus, sulfur, magnesium, copper and iron. 专利
申请日期: 2018-01-01, 公开日期: 2018-02-23
作者:  ZHANG X CAI Y ZHOU B LIU H MENG L M
收藏  |  浏览/下载:9/0  |  提交时间:2019/12/02
Nano-catalyst for toluene catalytic oxidation, is alpha-manganese dioxide, beta-manganese dioxide or mixture of alpha and beta manganese dioxide, is prepared by adding potassium permanganate into deionized water, stirring on water bath. 专利
申请日期: 2018-01-01, 公开日期: 2018-04-24
作者:  QU Z HUANG N WANG Y
收藏  |  浏览/下载:6/0  |  提交时间:2019/12/02


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