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1.變更機型：R51~R59 Series

2.變更部位：開關本體外殼卡耳

3.變更原因：改善耳部強度，增強安裝面版性能

4.變更前後外觀比較：

1. ECN model: R51~R59 Series

2. ECN part: apperance of ears re-designed to improve the stuck function

3. ECN reason: improve the enforcement of ears and enhance the placing function

4. ECN revised the appearance before and after:

【變更前 / BEFORE】	【變更後/ AFTER】