The utility model is capable of protecting bicycles and preventing slow operation of elements, high replacement rate and bad impact on decorative effects caused by rust of the bicycle.

本实用新型可以保护自行车，阻止因自行车生锈而引起的部件运转缓慢，更换率增高，影响美观等问题。

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Reliability and durability of the power transmission can be enhanced by preventing occurrence of adhesion, abrasion or rust at the contact portion between the members constituting coupling portion.

通过防止在构成连接部的构件之间的接触部中发生熔敷、磨损、或生锈等，能够提高动力传递装置的可靠性、和耐久性。

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Now I see. These elements must be helpful in preventing rust.

现在我明白了，这些元素一定是能够防锈的。

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