标准摘要
[中文适用范围]: 定义用于冲击钻孔的绳索螺纹钻钢设备上使用的左手绳索螺纹的尺寸和公差。 给出了五组值。 [外文原描述]: Defines dimensions and tolerances of left-hand rope threads to be used on rope threaded drill steel equipment for percussive drilling. Five sets of values are given.
英文名称Rock drilling equipment — Left-hand rope threads