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Teaching Instrument Joule's Law Demonstrator Experimenter Junior High School Senior high school Physics Electrical Energy Thermal Energy Conversion Model
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Three line semiconductor laser light source magnetic attraction type middle school physical optics experiment equipment large favorably
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U-shaped copper plug U-shaped wiring fork insert physical and electrical circuit experiment connection test wire opening 6mm
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Simple Harmonic Vibration Projection Demonstrator Sine Cosine Wave Projection Dynamic Pattern Law Change Physics Experiment Teaching
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Clock model clock teaching aids for grade one and two primary school students dial learning tools for children's mathematics special three-pin linkage
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ZNCL-B type intelligent magnetic stirrer zncl-bs digital magnetic stirring heating plate Ebot Technology
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The beginning Senior high school material of the ground-moon-sun three-sphere instrument student simulation three-sphere instrument model child's day-moon operation instrument.
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