“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	traceability of measurement traceability technology traceable traceable graph trace-admissible representation trace amount trace analysis trace anomaly traceback trace cache trace calculation trace chemistry trace class trace-class operator trace curve traced copy traced drawing tracee trace element trace element deficiency trace element fertilizer trace element geochemistry trace element pollution trace elements trace elements in coal

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