| 摘要 |
<p>The tool for working either hard stony soil or sticky soil, comprises a casing of trapezoidal longitudinal section in which is wedged either a pointed bar (7) for working hard stony soil or a plough/share (14) for working sticky soil. The pointed bar is provided with recesses and the support bar (13) with a single recess (15) engageable with a peg (10) provided on the support (8). The plough/share (14) is held on the support by means of a single bolt (18). The support has a part (8A) for preventing wear of the edge of the mouldboard as well as the parts permitting the location of the bar and the support.</p> |
