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New Physical and Electrical Experiment Demonstration Box--Teacher Edition (Magnetic attraction) All experimental components are equipped with strong magnets at the bottom, which can be firmly attached to the blackboard. The new large electric meter has a larger dial size and clearer readings. Large equipment, the teacher is lecturing and experimenting at the same time. The experimental effect is clear and obvious, which greatly improves the teaching effect. In the past, the teacher demonstrated on the desk that the students could not see all the experimental process. A difficult point.