The relationships between the points in space model and the dimensional classification of sphericalfour-barlinkage are also established.
建立了球面四杆机构的尺寸组合与空间模型上点之间的对应关系，进而讨论了球面四杆机构的尺寸型。
2
Starting off from the theory of spherical triangle, an analysis was carried out on the relation between component twist angle of sphericalfour-barlinkage and circuit of mechanism.