QB 1146-1991
Technical requirements and experimental methods for electroplated parts of mechanical Chinese typewriters (English Version)

Standard No.

QB 1146-1991

Language

Chinese, Available in English version

Release Date

1991

Published By

轻工业部

Latest

QB 1146-1991

QB 1146-1991 history

• 1991 QB 1146-1991 Technical requirements and experimental methods for electroplated parts of mechanical Chinese typewriters