| 摘要 |
<p>The cutting head, designed to use a number of relatively short sections of cutting line (12) held in place individually, has one or more radial slots (8) between the periphery (7) of the head and a central cavity (6). The size of each slot corresponds to twice the thickness of the cutting line, and each section of line fitted to the head is doubled and held in place by the bulge (13) formed where it is folded. The line used with the head can be of round, polygonal or square section, and the fold is made close to one end, so that the projecting line has a long main section (12a) and a short retaining section (12b).</p> |
