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内外加厚
dril.
external internal upset
;
internal-external upset
oil
external and internal thickening
钻杆
内外加厚
tech.
external and internal thickening
内外加厚
钻杆
dril.
external-internal upset
〔钻探管材〕内外加厚
earth.sc.
internal external upset
内外加 厚
:
9 phrases
in 5 subjects
Drilling
2
Earth sciences
1
Mechanics
1
Oil / petroleum
4
Technology
1
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