According to an embodiment, a coil spring is formed of a wire which is helically wound, and includes an end turn portion and an effective portion, and a surface of the wire in the end turn portion includes an area which is softer than a surface of the wire in the effective portion.
COIL SPRING, SUSPENSION DEVICE, AND METHOD FOR PRODUCING COIL SPRING
25.04.2024
Patent
Elektronische Ressource
Englisch
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