We tau ntseeg thiab ua haujlwm nrog cov khoom siv hluav taws ntse muaj ntau dua 12 xyoos, thiab muaj ntau tshaj 12 xyoos kev cog lus daws teeb meem rau txhua hom kev sib deev. Peb qhov zoo thiab kev pabcuam tau txais lub koob npe zoo los ntawm peb cov neeg sib koom tes ntev.
Cov Khoom Siv Zoo Tshaj ntawm Ceramic Abrasive
Zoo heev kev nthuav tawm ntawm Ceramic Exco
Strandard Ntau Lawm Daim Ntawv Teev Npe
