The third is answering how to extend the industrial chain, which kind of way adopts, what kind of pattern, to achieve any degree in extension of the industrial chain;
第三个问题是如何延伸煤炭产业链的问题，即采取哪种路径、何种模式、达到什么程度去延伸产业链；
The third is answering how to extend the industrial chain, which kind of way adopts, what kind of pattern, to achieve any degree in extension of the industrial chain;
第三个问题是如何延伸煤炭产业链的问题，即采取哪种路径、何种模式、达到什么程度去延伸产业链；
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