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

Overview SIST ISO 722:1997 is an international standard developed by the International Organization for Standardization (ISO) that specifies the dimensions for hollow drill steels used in rock drilli…

Rock drilling — Hollow hexagonal drill-steels in bar form

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

Overview ISO 722:1991 is an international standard developed by the International Organization for Standardization (ISO) that specifies the dimensions for hollow drill steels used in rock drilling eq…

Shipbuilding and marine structures — Shipborne barges, series 1, on barge carriers — Principal technical requ…

Overview ISO 7221:1984 establishes the principal technical requirements for shipborne barges, series 1, when they are loaded, unloaded and transported on board barge carriers. The standard addresses…