GB/T 4770.1-1984

The test methods for 3-channel open wire carrier telephone equipment

NORM herausgegeben am 1.1.1984

The information about the standard:

Designation standards: GB/T 4770.1-1984
Note: UNGÜLTIG
Publication date standards: 1.1.1984
Country: Chinese technical standard
Kategorie: Technische Normen GB