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Taste the blackboard eras / Teaching activities

Taste the blackboard eras
Taste the blackboard eras

The blackboard eraser is a necessity for school teaching.According to a Phenomenon while students are on duty and can't reach the height of blackboard due to the height problem ,I installed a extendible plastic shell on it ,we can control the length by a button.At the same time ,blackboard eraser are in a widevariety of colors ,so it is very popular with pupils

University

Zhongkai University of Agriculture and Engineering

Zhongkai University of Agriculture and Engineering
Guangzhou, China

Hao Jiang,
Zhongkai University of Agriculture and Engineering