Granite yog ib hom pob zeb uas tsis muaj zog uas paub txog nws qhov ua tau ntev, hardness, thiab ruaj khov.Cov khoom zoo no ua granite yog cov khoom siv zoo tshaj plaws rau lub hauv paus tshuab thiab siv rau hauv kev ua wafer.Hauv kab lus no, peb yuav tham txog qhov zoo thiab qhov tsis zoo ntawm kev siv grani ...
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