Higher mathematics teaching aid chi
The utility model discloses a higher mathematics teaching aid chi, including the solid fixed cylinder of a teaching ruler body, chalk, the 2nd teaching ruler body and the second groove of drawing, be provided with first draw groove and the third groove of drawing on the teaching ruler body, the chal...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model discloses a higher mathematics teaching aid chi, including the solid fixed cylinder of a teaching ruler body, chalk, the 2nd teaching ruler body and the second groove of drawing, be provided with first draw groove and the third groove of drawing on the teaching ruler body, the chalk solid fixed cylinder be fixed in on the rubber slider, the 2nd teaching ruler body is connected with a teaching ruler body through unsmooth chain, the straight line slide bar just is connected with the rotation axis including first sharp slide bar, rotation axis and second straight line slide bar between first sharp slide bar and the second straight line slide bar, on the one end of first sharp slide bar is fixed in the 2nd teaching ruler body, and be provided with the rubber slider on the first sharp slide bar, the trench is drawn on the 2nd teaching ruler body to the second, and the second is drawn the right side in groove and is provided with and carries the hole. This higher mathematics teaching aid chi need |
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