最終更新日:2022/12/24
The north section of the mine has also a crossback or cross-course, but the result at the crossing is so completely reversed that one is struck with astonishment to see the opposites in the same formation.
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The north section of the mine has also a crossback or cross-course, but the result at the crossing is so completely reversed that one is struck with astonishment to see the opposites in the same formation.