The image of the standby switch and the cover line are simple yet clever.
备用开关图像和封面行简单而优雅。
Clever idea, simple structure, easier operation, high efficiency and low cost.
巧妙的构思、简单的结构，更简易的操作，效率高，成本低。
Clever idea, simple structure, easier operation, high efficiency and low cost.
巧妙的构思、简单的结构，更简易的操作，效率高，成本低。
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