They are often called "whirly birds" or some similar title.
他们通常被称为“旋鸟”或类似名称。
The whirly demoulding mechanism designs of shape-gear and the whirly plastic parts of bevel gear injection mould were introduced.
介绍了斜齿轮塑件注射成型模具的齿形型腔旋转式和斜齿轮塑件旋转式两类脱模机构设计。
When it is in spring and winter, the white rapid, the green deep puddle and the whirly ripple reflects the shadows of all different kinds of sceneries.
到了春、冬两季时，白色的急流、绿色的深潭，回旋的清波倒映着各种景物的影子。
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