1-mill daim ntawv pov thawj 2-SGS Daim Ntawv Qhia Txog Cov Hlau Loj 3-SGS Daim Ntawv Qhia Txog Cov Hlau Loj 4-NDT Engineer Certificate 5-Welder Certificate BV Certified 6-MT Crack Detection 7-atema Kev Ntsuas Ntawm Vuam 7-atema Kev Ntsuas Ntawm Vuam 9-Ntog Ntxuav 10-dimension checking 11-Pre-installed nyob rau hauv lub Hoobkas