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油管头
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油管头
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井口装置
释
tubing head
油管头
油井生产管柱最上层装置。用于悬挂油管及密封油管与套管之间环形空间,上部接采油树配合生产。
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doublet
double-tagged PCR
double tagging
double-tagging
double-tailed test
double talk
double tangent
double-tangential knot
doublet antenna
double taxation
double taxation conventions
double-taxed household
doubleteeth pubescent angelica root
double tensor
doublet flow
doublet function
double thread polymer
double-time Green function
double-time Green's function
doublet lens
doublet objective
double torus
double-track grain prices system
double tracks sign
double track system for electronic records and paper records
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更新时间:2025/7/26 18:12:23