| 摘要 |
The plough has two elongate parts (4,5) reciprocally pivotable around an articulated axis line (10) at right-angles to their longitudinal direction. In a first position, the two parts are aligned with their ends in contact with each other. In a V-formation position, the end edge part (13) of the first part (4) is in contact with the concave surface of the other part along its complete length, so that a tight joint is formed between the parts even in this configuration. |
