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ISO 1720:1974 PDF
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Rock drilling — Extension drill-steel equipment for percussive long-hole drilling — Rope-threaded equipments 1 1/2 to 2 in (38 to 51 mm)
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 | 1974 |
|---|---|
| Published Date | 1974 |
| Published By | International Standardization Organisation |
| Page Count | 6 |
