令人惊叹地是，它仍然转动灵活，加速平稳。
It's surprisingly agile when taking turns, and smooth when accelerating.
特点：负荷大，噪音低，经久耐用，转动灵活。
Characteristics: heavy-duty, low noise, durable in use rotating flexible.
本机构转动灵活方便，工作稳定可靠，部件少，成本低。
The utility model has the advantages of flexible and convenient rotation, stable and reliable work, few components and low cost.
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