This ingenious mechanism serves to activate the functions simply by pressing the sapphire watch crystal.

只需简单按下手表上的深蓝水晶石，这个精细的机械装置就开始激活功能。

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This ingenious mechanism serves to activate the functions simply by pressing the sapphire watch crystal.

只需简单按下手表上的深蓝水晶石，这个精细的机械装置就开始激活功能。

youdao