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| план горизонта (Figure 56 shows a partial plan of a level at the Morning mine in Idaho, where the ore is in a vein 6 to 30 feet wide, dipping at 80° to nearly vertical. ArcticFox) | |||
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| план горизонта (Figure 56 shows a partial plan of a level at the Morning mine in Idaho, where the ore is in a vein 6 to 30 feet wide, dipping at 80° to nearly vertical. ArcticFox) | |||
