避免底盖变形影响手表密封性。

Prevent the deformation of the bottom cover to affect the sealing performance of the watch.

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步骤二：开启手表底盖。

Step two: open the bottom cover of the watch.

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它由侧面、端面、底及盖构成。

It consists of the side, bottom end, and cover.

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林肯因盖底斯堡演说而闻名于世。

Lincoln was known for his Getisbug speech.

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林肯因盖底斯堡演说而闻名于世。

Lincoln was known for his Getisbug speech.

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