WJ 989-1977
Investment casting mold components for optical instruments Investment casting mold supports for optical instruments (English Version)

Standard No.

WJ 989-1977

Language

Chinese, Available in English version

Release Date

1977

Published By

Professional Standard - Military and Civilian Products

Latest

WJ 989-1977

WJ 989-1977 history

• 1977 WJ 989-1977 Investment casting mold components for optical instruments Investment casting mold supports for optical instruments