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bottomhole
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plug
plug
dril.
塞
hydroel.st.
栓
manag.
堵
;
柱形的
;
插销
roll.
芯棒
;
芯塞
;
顶头
;
套
to phrases
bottomhole plug
:
24 phrases
in 3 subjects
Drilling
3
Oil / petroleum
19
Technology
2
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