| 摘要 |
<p>In a heading machine (1) including a travelling mechanism (2) and a cutting boom (3) or frame, the cutting boom (3) or frame carries at least two rotating cutting heads (5) whose axes of rotation (6) extend in the heading direction or enclose acute angles with the heading direction and which, together, define a cutting profile having a profile width (a), as well as two cutting rollers (8,10) arranged substantially parallel and behind the cutting heads (5) and capable of being positioned on the floor (9) and on the roof (7), respectively. Both cutting rollers (8,10) comprise end portions (25) which are extendible to the width (a) of the profile for the formation of a substantially rectangular cutting profile.</p> |
