Objavljen
Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: size of drill-steel in bar form; lengths of extension rods; coupling sleeves; bit diameters (four-wing bits); reverse-buttress threads; hollow hexagonal bars for extension rods.
OBJAVLJEN
ISO 1722:1974
90.93
Odluka o potvrđivanju standarda
6. 12. 2022.
Pribor za bušenje stena - Produžna čelična oprema za udarno bušenje dubokih rupa - Oprema sa reverznim trapeznim navojem od 1 1/2 in do 2 1/2 in (38 mm do 64 mm)
90.93 Odluka o potvrđivanju standarda