ISO 722:1991

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

Best Price Guarantee Feb 15, 1991 English 1 Pages

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ISO 722:1991

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

PUBLISH DATE 1991
ISO 722:1991

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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