ISO 1722:1974
p
ISO 1722:1974
6342

Abstract

 Preview

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.


General information 

  •  :  Published
     : 1974-09
  •  : 1
     : 6
  •  : ISO/TC 82 Mining
  •  :
    73.100.30 Equipment for drilling and mine excavation

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std 2 38 Paper
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