Petroleum engineers devise ways to identify and extract underground reservoirs of oil, natural gas, steam, and hot water, as well as using the empty reservoirs for the safe disposal of waste.
石油工程师想方设法从地下储存库中提取石油，天然气，蒸汽，热水并用储存库安全处理废物。
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The study has significant effects for underground oil, nuclear wastedisposal, design and construction for tunnel in cold regions.