According to serious rust joints and rust corrosion occurred the internal surface of pump body and the impeller after a long period operation of the gas drainage pump,pump jammed and other accidents would be easily occurred and even the pump shaft torsion broken and the motor burning danger would be cause. Thus those would be seriously affected to the stability of the mine gas drainage system and the mine safety production. With the chemical test analysis on the rust samples and water quality from a mine,th...
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