Granite yog cov khoom siv nrov xaiv rau cov khoom siv ntawm tus choj CMM (Kev Sib Koom Tes Ntsuas Tshuab) vim nws txoj kev ruaj ntseg zoo, ua haujlwm ntev, thiab tsis kam hnav thiab tsim kua muag.Txawm li cas los xij, tsis yog txhua yam khoom siv granite yog tib yam, thiab xaiv qhov tsim nyog raws li t ...
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