YBJ 23-1991
Pre-drilling side pressure test regulations (English Version)

Standard No.

YBJ 23-1991

Language

Chinese, Available in English version

Published By

Professional Standard - Ferrous Metallurgy

Latest

YBJ 23-1991

YBJ 23-1991 history

• 1970 YBJ 23-1991 Pre-drilling side pressure test regulations