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。
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。
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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