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ISO 1720:1974

Rock drilling -- Extension drill-steel equipment for percussive long-hole drilling -- Rope-threaded equipments 1 1/2 to 2 in (38 to 51 mm)

General information

Withdrawn from 01.01.1991
Directives or regulations
None

Standard history

Status
Date
Type
Name
24.01.1991
Main
24.01.1991
Main

Required fields are indicated with *

*
*
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Standard monitoring