| 摘要 |
<p>Coulter (10) for a seed drill comprising: an elongate pipe (11) having an inlet opening (12) at one end for introducing seeds or fertilizer into the pipe (11) and a discharge opening (13) at the opposite end, the discharge opening (13) comprising a bottom portion (14) and a trailing end portion (15), the trailing end portion (15) extending from the bottom portion (14) in the longitudinal direction of the pipe (11), and an adjustable closure device (20) configured to adjustably cover a proportion of the area of the trailing end portion (15) of the discharge opening (13).</p> |
