- Thesevengoodkinearesevenyears;andthesevengoodearsaresevenyears:thedreamisone.Thisarticleapproachestheapplicationoftheprincipleofvirtualdisplacementtokine-matics,setsupthe"virtualpower'sequation",andprovidesanewresearchmethodforkine-matics.Outofwhi...
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