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ISO 722:1991

Rock drilling equipment -- Hollow drill steels in bar form, hexagonal and round

General information
Valid from 24.01.1991
Directives or regulations
None
Standard history
Status
Date
Type
Name
24.01.1991
Main
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).
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Standard monitoring