“二叠纪煤系”的概念、定义、翻译、参考文献-科学参考

单词	二叠纪煤系
释义	二叠纪煤系 Encyclopedia 理学二叠纪煤系释 Permian coal measures二叠纪煤系在二叠纪时期连续沉积形成的一套含有煤层并具有成因联系的沉积岩系。又称含二叠纪煤岩系、二叠纪含煤建造、二叠纪含煤地层等。
随便看	drilling rock mechanics drilling round trip drilling semi submersible drilling solution mining drilling strata microbial characters drilling string erosion drilling string trouble drilling technical economic index drilling technical parameters drilling technology drilling theory drilling time drilling time curve drilling time logging drilling tool drilling tool bypass valve drilling tool weighting scale drilling workload index drillion drill pipe drillpipe drill pipe power tong drill pipe sticking drill plough drill rig

科学参考收录了854744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。