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Science and technology small production DIY colorful full-color light circuit experimental toys electromagnetic induction science small experimental material package

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Science and technology small production diy material package small invention hand-made dehydrator dryer elementary school students scientific experiment

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Homemade flute elementary school student simple musical instrument handmade diy technology small production educational science experiment teaching aids materials

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Electrostatic experiment diy friction electrification material package technology small production children's electrostatic demonstration steam classroom manual

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Student Experiment Professional Microscope Scientific Experiment HD Optical XSP-02 Professional Teaching Children Microscope

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Industrial clutch brake friction plate

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Super high temperature resistant grease high speed bearing mechanical wear-resistant Butter automobile industrial gear electric hammer factory wholesale

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Frictional electrification science experiment diy technology small production electrostatic demonstration material package steam classroom manual

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Children's kindergarten Elementary School students physics science experiment small production small invention electrostatic friction electric electrostatic experiment

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Friction experiment demonstrator material package trolley wheel labor-saving diy technology small production science classroom supporting

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Science and technology small production pole woodpecker science experiment package 7-14 years old primary school students friction physics experiment toy

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Science and technology small production STEM education maker handmade scientific experiment teaching aids diy assembly material package kit wholesale

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Electric hammer grease impact drill gear maintenance oil power tool lubricating grease friction resistance long life manufacturers

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100ml magic water sprite solution magic water baby special pigment handmade ocean baby supplement

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Polymer wear-resistant friction plate hexagon clutch brake pad motor brake accessories

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Air pressure disc brake friction plate for printing machine paper cutter industrial machinery air pressure disc brake pad

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Science and technology small production self-made Periscope Junior High School optical reflection experiment DIY light refraction propagation popular science model

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Hand spray butter lubricant bearing gear grease anti-high temperature mechanical hinge door lock abnormal sound deep lubrication

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Magic water elf water baby children's pearlescent solution toy suit diy handmade material toy

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Reggio three-sided mirror three-fold mirror small kindergarten science area doll's toy teaching aids

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Elementary School student science experiment playing teaching aids wind car Children's handmade technology small production small invention diy material

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Portable Children's Microscope 180 Times High Definition Scientific Experiment Toy Set Xueyouma Cross-border Hot Selling Puzzle

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One-piece air-powered car scientific experiment toy STEAM small production maker training DIY material

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DIY wind vane technology small production scientific experiment toy stem primary school student handmade material package wholesale

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Friction and Electricity Science Experiment Technology Small Production Student Handmade diy Electrostatic Materials Kindergarten Teaching Aids

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Science Experiment Solar Fan Children's Handmade Equipment Material Package Science and Technology Small Making Small Invention Science and Education Frontier

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Climbing monkey friction experiment diy technology small production material package kindergarten popular science hand-assembled educational toys

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