Isatifikethi se-1-mill Ingxelo yoVavanyo lwe-2-SGS yeNsimbi ePhambili Ingxelo yoVavanyo lwe-3-SGS yeNsimbi ePhambili Isatifikethi seNjineli ye-4-NDT 5-Welder Certificate BV Certified I-6-MT yokuFumana i-Crack Uvavanyo lwe-7-atema kwi-Welding Uvavanyo lwe-7-atema kwi-Welding I-9-ubuso bokucoca I-10-dimension Checking I-11-Ifakwe ngaphambili kumzi-mveliso