Kho cov tawg granite
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Kho cov tawg pob granite, corsal fab casting thiab uhpc
Qee qhov tawg thiab pob yuav cuam tshuam rau lub neej ntawm cov khoom. Txawm hais tias nws raug kho lossis hloov chaw nyob ntawm peb kev tshuaj xyuas ua ntej muab cov lus qhia kev tshaj lij.