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Downdraft rooj
Nws yog tsim rau ntau yam vuam, polishing, polishing, plasma txiav thiab lwm yam txheej txheem. Cov khoom no tau txais kev pom zoo thoob ntiaj teb, nrog kev pom zoo ntawm 99.9% rau vuam, txiav, thiab polishing pa luam yeeb thiab plua plav, thaum ua kom muaj huab cua txaus siab heev.