+86-13906275172

kõik kategooriad
ET

Avaleht>Meist>Sertifikaadid

Kvaliteedi kontroll

Gaoya is continuously rated as AAA bank credit enterprise and it’s also the member of China Engineering Construction Supervision & Management Association.What’s more,it has passed the EN1090 (European standard) Steel Structure Production Certificate, ISO 9001:2008 Quality System Certificate,as well as ISO 14000 Environment System Certificate.

Sertifikaadid