“水力扩张式封隔器”的概念、定义、翻译、参考文献-科学参考

单词	水力扩张式封隔器
释义	水力扩张式封隔器 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	Economics of the Public Sector economic soft landing economics of urban planning Economics of Welfare economic space economic specific frictional head loss economic spy economic stabilization and development law economic statistics economic structure economic structure of society economic system economic system reformation economic systems engineering economic take-off economic territory economic threshold economic transport air velocity economic trial economic types of agriculture region economic types of pastoralism economic ultimate recovery Economic Value Added economic value of water resources economic zone

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。