程潮铁矿淹井后采准井巷大面积坍塌，给生产造成严重影响。
After the inundation of shaft in Chengchao Iron Mine, large area collapse of development openings caused serious influence on production.
程潮铁矿淹井后采准井巷大面积坍塌，给生产造成严重影响。
After the inundation of shaft in Chengchao Iron Mine, large area collapse of development openings caused serious influence on production.
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