Drilling rigs for drilling of hydrogeological bore holes. Types. Basic parameters
NORM herausgegeben am 1.7.1991
Designation standards: GOST 28802-90
Publication date standards: 1.7.1991
The number of pages: 7
Approximate weight : 21 g (0.05 lbs)
Country: Russian technical standard
Kategorie: Technische Normen GOST