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coal height | |||
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thickness of a coal seam (Franka_LV); thickness of a coal bed (Franka_LV) | |||
coal height; coal thickness | |||
coal height (при горизонтальном залегании) |
мощность угольная пласта : 6 phrases in 3 subjects |
Gas processing plants | 3 |
Makarov | 2 |
Mining | 1 |