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我们实地参观了美国地质调查所丹佛煤炭分所和美国中西部大多数私人测井公司的煤田测井,现将他们利用测井资料进行煤质、煤的灰分和发热量分析的情况介绍于下。
We visited the coalfields of the United States Geological Survey, Denver Coal Branch and most private logging companies in the Midwestern United States. We now use them to analyze coal quality, coal ash and calorific value .