Grafické určovanie charakteristík obalových skrutkových plôch
Grafické určovanie charakteristík skrutkovo-skrutkových plôch
This paper is connected with the preceding one of M. Kuniak (Graphical determination of characteristics of enveloping helicoidal surfaces), Apl. mat. 9 (1964), 455-466, and examines the graphical constructions associated with the geometry of enveloping helicoid-helicoidal surfaces. These may be useful for the manufacture of new helicoidal objects.
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