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to phrases
plug back
dril.
回堵
tech.
封闭
plug-back
dril.
填井
;
打水泥塞
;
回注水泥塞
eng.geol.
封闭
;
封堵
oil
回堵
plug- back
:
7 phrases
in 3 subjects
Drilling
1
Oil / petroleum
5
Technology
1
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