The relationships between the points in space model and the dimensional classification of spherical four-bar linkage 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。
Starting off from the theory of spherical triangle, an analysis was carried out on the relation between component twist angle of spherical four-bar linkage and circuit of mechanism.
从球面三角理论出发，对球面四杆机构构件扭角和机构回路的关系进行分析；
Starting off from the theory of spherical triangle, an analysis was carried out on the relation between component twist angle of spherical four-bar linkage and circuit of mechanism.
从球面三角理论出发，对球面四杆机构构件扭角和机构回路的关系进行分析；
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