Granite yog lub pob zeb uas tsis muaj zog uas muaj ntau yam minerals, feem ntau quartz, feldspar, thiab mica.Nws yog lub npe hu rau nws cov kav ntev, lub zog, thiab tsis kam hnav thiab tsim kua muag, ua rau nws yog ib qho khoom siv nrov rau kev siv machining.Ib qho tseem ceeb ntawm kev siv granite yog nyob rau hauv c ...
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