“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	field of definition for variety field of directions field of events field of extremals field of finite type field of force field of formal Laurent series field of fractions field of frames field of functions field of geometric objects field of image field of interpretation field of line elements field of lines field of moduli field of moments field of natural coframes field of natural frames field of orthonormal coframes field of orthonormal frames field of p-adic numbers field of points field of prominences field of quotients

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