标准号:ISO 1721-1974
中文标准名称:岩石钻孔 深孔冲击凿岩用加长钻杆钎具 1 1/16和1 1/4英寸(27和32mm)反向锯齿螺纹
英文标准名称: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)
标准类型:D81
发布日期:1999/12/31 12:00:00
实施日期:1999/12/31 12:00:00
中国标准分类号:D81
适用范围:Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: shank adapters for central flushing, hexagon type and lug-shank type; extension rods; coupling sleeves; four-wing bits; reverse-buttress threads; hollow hexagonal bars for extension rods; hexagonal drill-steels.