“drill string non-return valve”的概念、定义、翻译、参考文献-科学参考

单词	drill string non-return valve
释义	drill string non-return valve Encyclopedia 工学井下工具释 drill string non-return valve钻具止回阀在内防喷系统中，连接于钻杆和钻铤间的防喷装置。
随便看	dissimilar matrix dissimilar redundancy dissimilar terms dissimilar threod dissimilation dissimilation change dissimilatory Fe(Ⅲ) reduction dissimilatory nitrate reduction to ammonium,DNRA dissipated energy dissipated minimum enegy in processing information dissipated minimum energy in processing information dissipate muffler dissipate structure theory dissipation dissipational collapse dissipation coefficient dissipation constant dissipation error dissipation factor dissipation function dissipation interaction dissipation is treated by astrigent dissipationless collapse dissipation mass dissipation of energy

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