Relating to the stages in the production of oil and gas before the raw material is ready for refining.
| 单词 | θ210444 |
| 释义 | society > occupation and work > industry > drilling for oil or gas > [adjective] > stage in production (1) upstream1965 Relating to the stages in the production of oil and gas before the raw material is ready for refining. |
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英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。