“hydraulic expansion packer”的概念、定义、翻译、参考文献-科学参考

单词	hydraulic expansion packer
释义	hydraulic expansion packer Encyclopedia 工学桥塞释 hydraulic expansion packer水力扩张式封隔器通过使胶筒内部压力大于外部压力（即使油管压力大于套管压力）而扩张，封隔油、套管环形空间的封隔器。
随便看	farmland non-point source pollution controlling farmland non-point source pollution control technology farmland obstacle recognition farmland path farmland pollution farmland pollution monitoring farmland pollution risk assessment farmland protection farmland radiation transfer farmland reclamation farmland retreat for lake recovery farmland rodent community Farmland Rodent Damage in East China farmland rodent infestation in Northwest China farmland sand prevention farmland shelterbelt nets farmland shelterbelts farmland soil evaporation farmland water harvesting farm machinery cooperation Farm Security Administration farm stay Farm tax system farm tools for site preparation farm transport vehicle

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。