FILE Russian patent published in 1997 - IPC

Abstract RU 2093321 C1

FIELD: mechanical engineering. SUBSTANCE: this file is primarily intended for filing articles made of light alloys and non-metal materials. File has set of strips which are provided with strengthened layers at both sides, and mechanism for fastening of aforesaid set of strips. Strips are fastened at incline to file axis with possibility of changing their incline angle to opposite angle. EFFECT: high efficiency. 3 cl, 4 dwg

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RU 2 093 321 C1

Authors

Kolchev Nikolaj Petrovich

Dates

1997-10-20—Published

1996-07-23—Filed