The utility model has the advantages of stable performance of the elastic restoring force, and low cost.

本实用新型具有弹性回复力性能稳 定、成本低的优点。

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The utility model has the advantages of stable performance of the elastic restoring force, and low cost.

本实用新型具有弹性回复力性能稳 定、成本低的优点。

youdao