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| angles of displacement (1) |
| continuity (1) |
| displacement of rocks (1) |
| scheme (1) |
| stopes (1) |
| subsidence of the land surface (1) |
| angles of displacement (1) |
| continuity (1) |
| displacement of rocks (1) |
| scheme (1) |
| stopes (1) |
| subsidence of the land surface (1) |