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vent crosscut (MichaelBurov); ventilation crosscut (MichaelBurov) | |||
vent cross cut (Jewelia) | |||
air connection; spout; air hole; air room (при камерностолбовой системе); ventilation breakthrough; air fracturing | |||
ventilation connection |
вентиляционная сбойка: 1 phrase in 1 subject |
Mining | 1 |