“keyseat reamer”的概念、定义、翻译、参考文献-科学参考

单词	keyseat reamer
释义	keyseat reamer Encyclopedia 工学井下工具释 keyseat reamer键槽扩大器连接于钻铤上方，用于破坏井身键槽，使钻铤免于键槽卡钻的装置。又称键槽破坏器。
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