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промежуточный горизонт stresses
el.	intermediate horizon (для закрытых трасс)
geol.	intermediate level; mid-shaft; mid shaft; counterlevel
mil., tech., water.suppl.	blind level
mining.	by-level; counter-level; intervening level; midshaft; sub-level; sublevel; subpanel

промежуточный горизонт: 2 phrases in 1 subject

Mining

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