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dual concentric drill pipe
dual concentric drill pipe
tech.
双层同心钻管
;
双壁钻杆
|
string
string
chem.fib.
斯特林
comp.
字符串
;
符号串
hydroel.st.
绳
;
带
met.
串
;
行
space
信息串
;
弦
sport.
弦
to phrases
dual concentric drill pipe
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tech.
双层同心钻管
;
双壁钻杆
dual concentric drill pipe
:
1 phrase
in 1 subject
Oil / petroleum
1
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