Reference number
ISO 1720:1974
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)
Edition 1
1974-07
Withdrawn
ISO 1720:1974
6340
Withdrawn (Edition 1, 1974)

General information

  •  : Withdrawn
     : 1974-07
    : Withdrawal of International Standard [95.99]
  •  : 1
     : 6
  • ISO/TC 82
    73.100.30 
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