“manual casing hanger”的概念、定义、翻译、参考文献-科学参考

单词	manual casing hanger
释义	manual casing hanger [`man·yǝ·wǝl `kās·iŋ ´haŋ·ǝr] ^{PETROLEUM ENGINEERING} A device in the bowl of the lowermost (or intermediate) casing head to suspend the next smaller casing string and to provide a seal between the suspended casing and the casing-head bowl.
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