和主轴垂直的轴叫做交叉轴，它在交叉轴方向上延伸。
The axis perpendicular to the main axis is called the cross axis. It extends in the cross dimension.
空间两轴垂直交叉的RSSR机构是空间连杆机构中应用最广泛的一种四杆机构。
The spatial RSSR mechanism with its input and output perpendicular to each other is a kind of most widely used spatial 4-link mechanism.
空间两轴垂直交叉的RSSR机构是空间连杆机构中应用最广泛的一种四杆机构。
The spatial RSSR mechanism with its input and output perpendicular to each other is a kind of most widely used spatial 4-link mechanism.
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