ISO 1722-1974 Rock drilling-Extension drill-steel equipment for percussive long-hole drilling-Reverse-buttress-threaded equipments 1 1/2 to 2 1/2 in (38 to 64 mm)
标准号
ISO 1722-1974
英文名称
Rock drilling-Extension drill-steel equipment for percussive long-hole drilling-Reverse-buttress-threaded equipments 1 1/2 to 2 1/2 in (38 to 64 mm)
