| 摘要 |
Plastic seed drill consisting of the combination of a distributor 2, 3 having interchangeable discs 5 and of a drilling wheel having drilling tips 9, 10 of variable number mounted on two concentric rings 6a, 7. The plastic seed drill as a whole is carried by one or two wheels 21, 21a adjusting the depth of penetration of the drilling tips into the ground. <IMAGE>
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