GB 3490-1983
Metallographic examination method of copper oxide copper-containing precious metal materials (English Version)

Standard No.

GB 3490-1983

Language

Chinese, Available in English version

Release Date

1983

Published By

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China

Latest

GB 3490-1983

GB 3490-1983 history

• 1983 GB 3490-1983 Metallographic examination method of copper oxide copper-containing precious metal materials