Tanúsítványok
Koso Valves - Quartet-Tech KFT Partnership - 2018
MARC /I/
MARC /II/
VCA/SCC - 2011
ISO 9001 - 2015 HU
ISO 9001 - 2015 EN
Xomox
2018 - Kazincbarcika - Quartet-tech Kft.