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longwalling by top-slicing; longwall mining; longwall tophole system; longwall work; longwall; longwork; modified longwall; regular longwall | |||
longwall stoping |
выемка лавами : 38 phrases in 5 subjects |
Energy industry | 2 |
Geology | 2 |
Makarov | 2 |
Mining | 29 |
Technology | 3 |