| 摘要 |
<p>The tool comprises a structure (1) of triangular longitudinal section, defining three faces (2, 3, 4), namely: a first inclined face (2) that is longer than the others, a second base face (3), and a third face (4) that scrapes the mud forward. The invention is characterized in that it comprises: an extension (5) of the first face (2) that projects out above the third face (4), with the same slope as said first face (2); and a shortening (6) of the point that would be formed by the first face (2) and second face (3), said shortening (6) being perpendicular to the second face (3).</p> |
