“principal mining level”的概念、定义、翻译、参考文献-科学参考

单词	principal mining level
释义	principal mining level 主要开采水平
随便看	life insurance policy (LIP) life insurance premiums life insurance trust life insurance with dividend life intensity life interest (指非世袭的财产) life jacket life leasehold life length lifeless lifeless rubber life level life line lifeline game life-load stress life meter life of blast furnace life of contract life of delivery life office life of loan life of stock life of the die life pass life performance

科学参考收录了1248194条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。