Brush wheel drive and the golden ratio design structure, to ensure the cleaning work, very easy and simple.

刷盘驱动和结构黄金比例设计，确保在清洁工作时，非常轻松、简单自如。

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Numbers in this series crop up frequently in nature and the relationship between components tends towards 1.618, a figure known as the golden ratio in architecture and design.

这个数列中的数字常常不经意地在自然界中浮现，而数字间的比率关系接近1.618，它还是在建筑和设计上称为黄金比率的数字。

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