00251nam a2200109Ia 4500008004100000041000800041082002000049100002100069245003400090260000900124300000800133211209s1975    xx            000 0 und d  aeng  a621.815 N75 CHA  aCHAKRABORTHI N R  aDATA BOOK FOR MACHINE DESIGN   c1975  a720