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to phrases
Dull Grading
stresses
dril.
Оценка износа долота
(по шкале IADC
Kazuroff
)
dull grade
dril.
код износа долота
(напр., по классификации IADC
Alexander Dolgopolsky
)
Dull Grading:
3 phrases
in 2 subjects
Drilling
2
Oil / petroleum
1
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