“drill string non-return valve”的概念、定义、翻译、参考文献-科学参考

单词	drill string non-return valve
释义	drill string non-return valve Encyclopedia 工学井下工具释 drill string non-return valve钻具止回阀在内防喷系统中，连接于钻杆和钻铤间的防喷装置。
随便看	covalent covalent binding covalent bond covalent bonding covalent chromatography covalent compound covalent coordinate bond covalent cross-link probe covalent crystal covalent diastereoisomers covalent glass covalent graph covalently bonded network covalently closed circular DNA covalently regulatory enzyme covalent modification of regulation covalent network covalent organic framework polymer covalent organic polymer covalent radius covariance covariance analysis covariance distribution covariance function covariance functional

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。