In many parts of the country old collieries are being rejuvenated, reconstructed and expanded to produce more coal.Expansion is going on at full speed ahead at Kailan in north China and Fushun in the...
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In many parts of the country old collieries are being rejuvenated, reconstructed and expanded to produce more coal.Expansion is going on at full speed ahead at Kailan in north China and Fushun in the...