| 摘要 |
Device for tensioning a cable 2 by an automatic system using an electric motor 4, making it possible to move the wire of an electric fence for penning animals, characterised by a winder situated on a lever 6 which can move about a spindle, but is held integral with a fixed frame by an adjustable spring 7, the wire being paid out when the tension is stronger than that desired and being wound up in the reverse case. <IMAGE>
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