| 摘要 |
<p>The harrow tine is secured by the top and in a vertical position on a frame. For at least the greater part of its height its cross-section increases from bottom to top, while its width, measured horizontally at right angles to the travel direction, remains constant. Below the part where the cross-section starts to increase there can be section of constant cross-section joining directly onto it, while the lowermost end has a tapering tip.</p> |
