| 摘要 |
1515360 Rotary soil working impiement C VAN DER LELY NV 16 Dec 1975 [23 Dec 1974] 53058/77 Divided out of 1515359 Heading A1B The subject matter of this Specification is identical with that of Specification 1515359, but the present claims are concerned with the provision of a spring to the rear of the pivot axis of each screen for maintaining each screen parallel to intended direction of operative travel. |
