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0~20 ohm lab Adjustable Slide Rheostat for expe...
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Static electricity Wimshurst Generator physics ...
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single phase detachable transformer for teaching
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e1 iron core miniature transformer for senior s...
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physics glass conductive demonstrator with indi...
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Transformer principle explainer for physical te...
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aluminum alloy fuse function demonstrator for t...
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6v 4ah 10ah 15ah microcomputer multi-function c...
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6v 0.3a output transparent shell hand generator