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How To Start A Process Analysis Paper On Coal Mining Safety

How To Start A Process Analysis Paper On Coal Mining Safety

The main shaft and auxiliary shaft in the Guotun Coal Mine underwent large deflections with deflection values of 359 mm and 322 mm respectively These two deflections represent the first occurrence of such large vertical shaft deviations in the soil strata in China The deflection problem has seriously affected the hoisting safety and lining safety and has become a serious impediment to the

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