| 摘要 |
Apparatus for digging through a sidewall of a pit (P) using a self-propelled mole (20), comprising a frame having a support (6) for hanging the frame into the pit by placing the support (12) on ground surrounding the pit, and a cradle (8) to hold the mole (20),
wherein the cradle (8) includes angle-adjustment means and is attached at an unadjustably fixed vertical position along the frame, so that in use the mole (20) is held in a position within the pit for insertion into the sidewall at a depth which is unadjustably fixed relative to ground surface, and at an angle which is adjustable relative to the ground surface. |
