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Function reproduce the design of mechanism design test one crank-rocker mechanism, reproduction function requirements: the corner of the scope of the importation of component 180 °, the output component swinging angle range 30 °, namely: When the input from a component to a+ 90, the output components from the b Go to b+ 30, when the importation of components from a+ 90 to a+ 180, the output component from b+ 30 to b