GB 9812-1988

Drill collars for hydrogeologic and water well drilling

NORMA vydaná dňa 1.1.1988

Anglicky a čínsky -
Elektronické PDF (215.10 EUR)

The information about the standard:

Designation standards: GB 9812-1988
Note: NEPLATNÁ
Publication date standards: 1.1.1988
Country: Chinese technical standard
Kategória: Technické normy GB