| 摘要 |
<p>Improvements according to which each seed distributor, which is of the pneumatic type, is linked via, preferably, two take-up devices, with the corresponding turbine which generates the seed-conveying negative pressure, said distributor presenting a carefully designed interior structure, and its seal which is in contact with the corresponding perforated disc and its selector mechanism for the take-up of a single seed. <IMAGE></p> |
