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осложненные условияstresses
dril. troublesome environment (VPK)
осложнённые условия
O&G, oilfield. challenging situation (MichaelBurov); challenging conditions (MichaelBurov)
осложнённые условия: 15 phrases in 5 subjects
Drilling6
Oil / petroleum4
Oil and gas technology2
Sakhalin1
Well control2