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循环接头
xúnhuán jiētóu
dril.
cir. sub
oil
circulating sub
;
circulating nipple
冷却水
循环接头
xúnhuán jiētóu
chem.
circulating connection
循环
异径
接头
dril.
circ swedge
循环接 头
:
5 phrases
in 3 subjects
Drilling
1
Oil / petroleum
3
Technology
1
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