| DENUMIRE | LOCALITATE |
| CONCAS | BUZAU |
| CONFERIC | BUZAU |
| CONLOC | RAMNICU SARAT |
| CONPRIF | BUZAU |
| CONSTRUCTII FEROVIARE DRUMURI PODURI | BUZAU |
| INTEGRAL | BUZAU |
| MECAN CONSTRUCT | BUZAU |
| DENUMIRE | LOCALITATE |
| CONCAS | BUZAU |
| CONFERIC | BUZAU |
| CONLOC | RAMNICU SARAT |
| CONPRIF | BUZAU |
| CONSTRUCTII FEROVIARE DRUMURI PODURI | BUZAU |
| INTEGRAL | BUZAU |
| MECAN CONSTRUCT | BUZAU |


certification according to the conditions of the ISO 9001 standard:2015 / SR EN ISO 9001:2015
