双斜边一号砂轮。
This thesis regards edge curve of a real gear wheel as the research object.
本文以一个实际的齿轮的边缘曲线为研究对象。
The steering wheel rim has a flat lower edge.
方向盘的边缘有一个平坦的下边缘。
Aluminum rim: round piece of metal forming the edge of a wheel.
铝环：圆形一块金属成形的边缘车轮。
Aluminum rim: round piece of metal forming the edge of a wheel.
铝环：圆形一块金属成形的边缘车轮。
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