| 摘要 |
The subject of the invention is a system which exerts a certain pressure on a compartment of harrows. The thrust cylinder 3, which is connected to one or more thrust cylinders, is filled to 2/3 full and pushes the swinging arm 4 which transmits the movement on to the compartment of harrows 2 by means of the connecting rod 5. The system can only operate with a minimum of two compartments. <IMAGE>
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