The fifth is assigned to crack shaft (with the doline in the same seam).
五配竖井(坑与相通)。
The fifth is assigned to crack shaft (with the doline in the same seam).
五配竖井(坑与相通)。
Fourth, Fifth, Fei Bao underground river next to crack doline distribution.
四暗河接飞瀑 五配坑。
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