Photo 1 of Dalton Board/Galton Board, Effective Statistical Law Demonstration,Experiment Model for PhysicalSchool Laboratory Teaching Demonstration Teaching (Blue)

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Photo 1 of Dalton Board/Galton Board, Effective Statistical Law Demonstration,Experiment Model for PhysicalSchool Laboratory Teaching Demonstration Teaching (Blue)Photo 2 of Dalton Board/Galton Board, Effective Statistical Law Demonstration,Experiment Model for PhysicalSchool Laboratory Teaching Demonstration Teaching (Blue)