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)
1 korr 1974
95.99
Withdrawal of Standard
1 jan 1991
General information
95.99
1 jan 1991
ISO
ISO/TC 82
International Standard
73.100.30
anglisht
frëngjisht
Scope
Life cycle
NOW
WITHDRAWN
ISO 1720:1974
95.99
Withdrawal of Standard
1 jan 1991