This coal ash, etc. is used. If you do not import a Japanese coal ash does that new environmental destruction caused to the really clay mine development? Not like that. It is used as a clay substitute not only coal ash. Ash, are dust, sewage sludge, garbage, etc. of various plant sludge are used. Holy Cement and Asia Cement imported unless the Japanese coal ash are making good cement without cla..
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2019. 10. 30. 14:22
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