| 摘要 |
<p>1399981 Drill coulters L J JUNNILA 3 July 1973 [3 Oct 1972] 31687/73 Heading AID A seeding &/or fertilising apparatus comprises vertically pivotal spring loaded drill coulter arms 5 which are resiliently connected to the drill coulter tubes 3 by spring tines 3. Each tine has a pair of side plates 20 and a wear resistant tip 18 attached at its lower end. The height of the arms is adjusted by means of a screw 12 and associated linkage.</p> |
