On the focal surfaces of the congruences generated by the instantaneous screwing axes connected with some surfaces

GÜL, Türkan2019-04-192019-04-191303-5991http://hdl.handle.net/20.500.12575/60967https://doi.org/10.1501/Commua1_0000000466On the focal surfaces of the congruences generated by the instantaneous screwing axes connected with some surfaces001011