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Science-popularization demonstration device for electroluminescent material
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Pinhole imaging teaching tool
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Mechanical transmission stepless speed changing science popularization interaction education exhibition device
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CN104167123A
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Hand-operated science popularization exhibition teaching aid for string-free musical instrument
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CN104157191A
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Logic module demonstration device
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Three-dimensional imaging science popularization teaching tool
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CN104167137A
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Demonstration teaching aid for working principle of nixie tube
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Novel table type science popularization show teaching aid
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CN104167036A
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Power supply-free radio frequency integrated circuit (RFIC) card door lock
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Hand-cranking electricity generating RFIC interactive intelligent audio system for children science popularization exhibition product
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CN104167133A
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Novel science popularization demonstration apparatus for siphon principle
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CN104167127A
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Novel science popularization demonstration and exhibition apparatus for particle accelerator
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CN104167136A
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Novel voltaic battery science popularization demonstration apparatus
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