extraction indicator造句

His publications include, a book chapter on " Underground Mine Design " ( SME Mining Engineering Handbook 2011 ), " Supply and demand analysis of rare-earths ", " Assessment tools, prevailing issues, and policy implications of sustainability in China mining-communities ", " Comparison of typical regulatory mechanisms for improving global mine safety ", " Key deposit indicators and key ore-extraction indicators in mineral extraction ", " Risk assessment of safety violations for coal mines ", " GPS and google-earth systems in surface mines ", " Effects of legislation on mine safety technology and innovation in the USA " and more.
It's difficult to find extraction indicator in a sentence. 用extraction indicator造句挺难的