标准摘要
[中文适用范围]： 规定设备的基本尺寸。 给出组件列表；与图表一起列出：棒材钻钢的尺寸；延长杆的长度；连接套筒；钻头直径（四翼钻头）；反偏梯形螺纹；用于延长杆的空心六角形棒材。 [外文原描述]： Specifies the basic dimensions for equipment. Gives a list of components; tabulates together with figures: size of drill-steel in bar form; lengths of extension rods; coupling sleeves; bit diameters (four-wing bits); reverse-buttress threads; hollow hexagonal bars for extension rods.
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)