Yuav ua li cas txiav txim qhov Authenticity ntawm lub installation, Overhaul and Maintenance Qualification Certificate for Explosion-Proof Electrical Equipment

Kev tsim nyog rau lub installation, kev pabcuam, thiab kev saib xyuas cov khoom siv hluav taws xob tawg tau muab faib ua ob hom: daim ntawv pov thawj tuam txhab thiab cov ntawv pov thawj tus kheej.

Txhua daim ntawv pov thawj tau muab tus lej pov thawj sib txawv. This number enables the verification of the certificate’s legitimacy by checking with the issuing authority.