“drill collar”的概念、定义、翻译、参考文献-科学参考

单词	drill collar
释义	drill collar Encyclopedia 工学钻井装备释 drill collar钻铤钻杆柱与钻头之间的零件。
随便看	ethnographical method Ethnographic conceptualism Ethnographic Law Ethnographic Museum of Kruja ethnography ethnography of schooling ethnolinguistic nationalism Ethnological Notebooks ethnology ethnomathematics ethnomethodology ethnomusicology Ethno-National Studies Ethno-National Work in Contemporary China Ethnophilosophy ethno-science ethnosociology ethofenprox ethogram ethological theory of aggression ethology Ethology Museum，South-Central University for Nationalities ethophysiology ethoprophos ethos

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。