Introduction: Hazards Coal Identification: Mine Health and Safety Council
MINE
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Introduction: Hazards Coal Identification: Mine Health and Safety Council
6 794 просмотра · 9 л. назад
MINE
1,61 тыс. подписчиков
6 794 просмотра · 9 л. назад
Training Video on the improvement of barring down practices in underground Coal mine.