Roughness visual identification teaching aid

The present utility model discloses a roughness visual identification teaching aid, which comprises a middle axle and iron sheets of different surface roughness. One side of the iron sheets is provided with connection pins positioned at different locations and provided with connection holes. The mid...

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Bibliographische Detailangaben
Hauptverfasser:	YANG QIN, JIANG GUANGXING, PENG CHENYUAN, HE BAITING, HAN YEXIN, ZHANG ZHEN, ZHANG XIAOYU, MOU GUOPING
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND,DEAF OR MUTE CRYPTOGRAPHY DIAGRAMS DISPLAY EDUCATION EDUCATIONAL OR DEMONSTRATION APPLIANCES GLOBES PHYSICS PLANETARIA SEALS
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Beschreibung
Zusammenfassung:	The present utility model discloses a roughness visual identification teaching aid, which comprises a middle axle and iron sheets of different surface roughness. One side of the iron sheets is provided with connection pins positioned at different locations and provided with connection holes. The middle axle passes through the connection holes to be movably connected with the iron sheets. The two ends of the middle axle are provided with barrier pieces. The teaching aid is simple in structure. By means of the teaching aid, the visual and tactile sensation on the roughness can be provided.