Siv rau vuam 500MPa tsawg alloy steel ib leeg thiab ntau dhau vuam;kuj rau kev kub ceev nyias daim hlau, yeeb nkab kab hlau vuam.
Haum rau kev tuav vuam, tsis siv neeg vuam thiab cov neeg hlau vuam, xws li cov tshuab roj, cov tshuab hnyav crane, cov hlab ntsha siab,
roj-tshuaj hlab ntsha, nkoj lub cev, kev tsim kho steel qauv, thiab lwm yam.