Method to solve problem of underground drill hole freezing in winter是什么意思 Method to solve problem of underground drill hole freezing in winter怎么读-字典翻译

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Method to solve problem of underground drill hole freezing in winter

Method to solve problem of underground drill hole freezing in winter是什么意思 Method to solve problem of underground drill hole freezing in winter怎么读

解决井采冬季生产冻孔难题的研究

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