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защитная рудная корка
| при
| выемке целика
| защитная рудная корка | |
| mining. | ore rib; ore shell; protect-layer of ore; protective ore cover |
| при | |
| gen. | in view of; given; because of; for; with; about |
| выемка целика | |
| mining. | pillar drawing |
| |||
| ore rib; ore shell (при выемке целика); protect-layer of ore; protective ore cover (при неустойчивых перекрывающих породах) | |||
| защитная рудная корка: 3 phrases in 1 subject |
| Mining | 3 |
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