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drill pipe grade
drill pipe grade
oil
钻杆钢级
|
code
code
gen.
为...编码
el.
规则
hydroel.st.
编码
;
标准
hydroel.st. од.
法规
met.
码
;
电码
;
符号
;
标记
;
规则
to phrases
drill pipe grade
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oil
钻杆钢级
drill pipe grade
:
3 phrases
in 2 subjects
Drilling
1
Oil / petroleum
2
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