HG 2173-1991
Silver gelatin microphotographic negative film (English Version)

Standard No.

HG 2173-1991

Language

Chinese, Available in English version

Release Date

1991

Published By

化学工业部

Latest

HG 2173-1991

HG 2173-1991 history

• 1991 HG 2173-1991 Silver gelatin microphotographic negative film