Qeb 4.8 U ntsia liaj qhov rooj

1. Tsim thiab ua lag luam ib qho chaw nres tsheb los ntawm peb tus kheej .2. Ruaj khov ua khoom siv los ntawm cov khoom siv hlau hauv tebchaws steel .3. Ua ntej ntau lawm kab ua machine.4. Ua ntej tsis zoo li cov kev kho cov txheej txheem cog lus. Kev Tshawb Fawb Kev Muag Khoom Thoob Ntiaj Teb .6. Cov kws tshaj lij tom qab muag pab pawg ua raws li cov neeg siv khoom thoob ntiaj teb. Ruaj khov ua khoom siv los ntawm cov khoom siv hlau hauv tebchaws steel .8. Advanced ntau lawm kab ua tshuab.9. Ua kom tau siv tsis siv neeg kho cov txheej txheem cog lus coolstal.10.Profess International muag pab pawg.11.Professional pab pawg ua raws li cov neeg siv khoom thoob ntiaj teb.