| 摘要 |
<p>A chain digger attachment (10) for boom (11) mounted operation with disconnectable couplings (13, 66, 67), the attachment having a chain (17, 60) extended about sprockets (19, 23, 61, 83) on a telescopic support frame (14, 64, 65) having sideways feeding discharging augers (27, 28, 81, 82), clearing ploughs (72) and elongate chain guard (73) along the return reach of the chain (60).</p> |
