Txoj kev ntawm cov hlau hom tooj rau vuam:
Vuam steel muaj xws li carbon steel, welded alloy steel, thiab stainless hlau rau welded steel. Tus txheej txheem ntawm lub hom yog ntxiv ib lub cim "H" rau ntawm lub taub hau ntawm lub hom steel. Piv txwv li: H08, H08MN2SI, H1CR18NI9. Kho kom zoo-zoo-zoo vuam hlau, ntxiv cov cim "A" rau tus Tsov tus tw ntawm lub hom. Piv txwv li: H08A, H08MN2Sia.
