Rock drilling equipment — Hollow drill steels in bar form, hexagonal and round
NORM herausgegeben am 24.1.1991
Bezeichnung normen: ISO 722:1991-ed.3.0
Ausgabedatum normen: 24.1.1991
Zahl der Seiten: 2
Gewicht ca.: 6 g (0.01 Pfund)
Land: Internationale technische Norm
Kategorie: Technische Normen ISO
Description / Abstract: Specifies the dimensions for seven nominal sizes. This third edition cancels and replaces the second edition (1985), which has been technically revised (addition of round drill steels and extension of the range of sizes).