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Standard [CURRENT]

ISO 1721:1974-08

Rock drilling; Extension drill-steel equipment for percussive long-hole drilling; Reverse-buttress-threaded equipments 1 1/16 and 1 1/4 in (27 and 32 mm)

German title
Gesteinsbohrung; Verlängerungsgestänge zum Langloch-Schlagbohren bohren; Geräte mit umgekehrtem Sägezahngewinde 1 1/16 Zoll und 1 1/4 Zoll (27 und 32 mm)
Publication date
1974-08
Original language
English
Pages
6

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Publication date
1974-08
Original language
English
Pages
6

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Replacement amendments

This document replaces ISO/R 1721:1970-11 .

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