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2433 Lorentz force demonstrator
3129 Archaeopteryx fossils model
3217 Archaeopteryx fossils and restitution
3323 Heartbeat and blood circulation model
6072 Mercury thermometer
309 The circular area of PI demonstrator
6402 Crucible forceps
2611 Blowing-type kerosene blowtorch
2513-1 Laser light source
2130 Centripetal force demonstrator
2131 Centripetal force experimental apparatus
2186 Archimedean principle and application demonst
21003 Motion and force demonstrator
2369-1 Circuit board for junior middle school stud
X296 Circuit game board
2432 Ac circuit characteristic demonstrator
2484 Gate circuit demonstrator
2254 Mechanical energy heat interconvert demonstra
29030 Circular magnet
X2531 Semiconductor laser light source
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