| 摘要 |
1312628 Power lift linkages DEERE & CO 28 April 1970 [28 April 1969] 70355/70 Addition to 1312627 Heading A1P The subject matter of this Specification is similar to that described in Specification No. 1,312,627 but with the modification that the implement is trailed, in use, from the tractor draft responsive drawbar 24 and a tension spring 18a acts on the lift arms 18 to bias the tractor hydraulic motor 13 towards its retracted position. |
