Cov neeg feem coob tau hnov txog cov xuab zeb blasting, txheej txheem hauv qhov chaw uas tau ntxuav los ntawm blasting sib xyaw ntawm cov cua kub siab thiab cov xuab zeb. Ntawm qhov ceev no, cov xuab zeb yuav roughen thiab tshem tawm cov xim, xeb, thiab dav dav, tawm hauv qhov chaw huv si. downside rau cov txheej txheem no yog tias nqus cov silica hmoov av los ntawm ...
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