Cov kav hlau tsis muaj qhov sib txuas rau cov khoom siv ua chiv siab
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Cov kav hlau tsis muaj qhov tsis sib xws rau cov khoom siv ua chiv siab-GB6479-2013
Cov yeeb nkab hlau tsis muaj qhov sib txuas rau cov khoom siv chiv siab yog cov hlau ua los ntawm cov pa roj carbon zoo
thiabhlau alloy seamless yeeb nkabtsim nyog raucov khoom siv tshuaj lom neeg thiabcov kav dej.
Cov yeeb nkab hlau no nyob rau hauvGB6479-2013tus qauv.
