| 摘要 |
<p>A cover (16) for a cutter head (14) connectable to a ladder (12) includes a first portion (22) shaped to fit around at least a portion of a cutter head (14); a second portion (24) connected to the first portion (22) and shaped to fit at least partially around the cutter head (14) and at least partially within the first portion (22); and at least one movement system (26, 28) for moving at least one portion (22, 24) of the cover (16).</p> |
