文中提出的螺旋运动方程对闭式运动链，即空间机构同样适用。
The screw motion equation presented is also suitable for closed chains, i. e. spatial mechanisms.
根据含复铰平面闭式运动链的基本参数，定义了度谱、构件谱和复铰谱。
The spectrums of degree, structural component and multiple hinges are defined according to the basic parameters of planar closed kinematic chain with multiple hinges.
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