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厚壁钻杆
dril.
extra-heavy drill rod
;
extra-heavy pipe
;
heavy weight drill pipe/heavy wall drill pipe
;
heavy wall drill pipe
;
thick-wall drill pipe
;
havi-wate drill pipe
earth.sc.
thick wall drill pipe
mech.
thick wall drillpipe
厚 壁 钻杆
:
5 phrases
in 2 subjects
Metallurgy
3
Technology
2
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