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Comparative experiment for showing electromagnet magnetic strength
20529.50
Art NO.:20529.50
The hollow solenoid coil φ15m/m 150 rolls
The hollow solenoid coil φ30m/m 150 rolls
The hollow solenoid coil φ15m/m 300 rolls
battery holder 3pcs, compass 2pcs
iron rod 1pc, connecting cable with plug 1 set
battery 3pcs.

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