EDUCATIONAL DEVICE FOR GEOMETRY Russian patent published in 1998 - IPC

Abstract RU 2121165 C1

FIELD: descriptive geometry. SUBSTANCE: device has model of object under investigation, vertical plate with round hole, bars, struts, perpendicular panels, cone pair, shaft, two pulleys. EFFECT: simplified design. 3 dwg

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RU 2 121 165 C1

Authors

Utishev E.G.

Dates

1998-10-27—Published

1996-03-31—Filed