| 摘要 |
This invention relates to a drill rig (10) or drill driver and more particularly, but not exclusively, to a drill rig for roof bolting applications underground. In accordance with this invention there is provided an elongate support member (11), a magnetic drive unit (12, 14) with an attachment means (13) for securing a rock drill machine thereto and being able to travel along the elongate support member (11) under magnetic force. |
