Pierre Rocque : Mining 101 Ep 3. What is Backfill St Andrew Goldfields 0:48 11 years ago 35 Скачать Далее
What is Underhand Cut and Fill? Mining 101: Ep 4. Even Keel Media 0:35 13 years ago 4 291 Скачать Далее
Backfill Plant Operator Underground Mining interview questions Morning Star 1:10 6 years ago 746 Скачать Далее
ONE MINE IN MOGOK. Episode 3. IVY / YAVORSKYY Gems, Travel & Knowledge 1:01 5 years ago 986 Скачать Далее
What is Mining - More Science on the Learning Videos Channel Harmony Square - Educational Videos & Activities 4:18 4 years ago 100 656 Скачать Далее