Khoom nta
1.Txoj kev siv tau
2.MEED sib txawv ua haujlwm los ntawm kev nce qib lossis txo tus lej lossis hloov cov kev sib dhos txaus, thiab kev rov ua kom zoo dua thiab.
3. Quals nyiam ntsuas
Nruab Nruab Dav
Cov ntaub ntawv sib txawv thiab cov phaj ua tiav tshaj plaws tuaj yeem ntsib cov kev hloov pauv kub sib txawv, nrog kev tsim kom muaj siab thiab lub cheeb tsam siab. Nws yog dav siv nyob rau hauv ntau daim teb xws li HVAC, lub zog, tshuaj, roj av, metallurgy, zaub mov, thiab lwm yam
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