发明授权
EP2521700B1 Method for cementing wellbores in subterranean formations with cement compositions comprising sub-micron alumina 有权
在地下岩层用含有与粒径的氧化铝中的“亚微米”区域水泥组合物固井钻孔方法

Method for cementing wellbores in subterranean formations with cement compositions comprising sub-micron alumina
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