The actual dynamic role of mechanism consisted of Ⅲ links assur group could be investigated by means of degradation of mechanism from Ⅲ links assur group to Ⅱ links assur group
configurations of Ⅲ links assur group has determined
there are 27 types of configurations for Ⅲ links assur group and 16 types of computational patterns
the analysis and design of mechanism could be carried out based on these obtained 16 types of computational patterns.