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

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Simulation traffic light toy live voice broadcast traffic lights little boy early education sound and light toy ornaments

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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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Scientific experiment sound wave imager technology small production primary school students can see the sound of manual assembly model

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steam science experiment handmade DIY artificial satellite solar Wood physics technology small making toy material

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Creative Technology Small Production Friction Experiment Brain Tiangong Primary School Kindergarten Science Experiment Toys Free Shipping

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Industrial clutch brake friction plate

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Primary and secondary school students physical teaching aids scientific material package DIY manual space solar photovoltaic power generation satellite model

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Scientific experiment diy climbing monkey physical friction technology small production student children handmade school material package

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Children's Montessori Early Education Mathematics Learning Stick Color Cognitive Matching Board Wooden Stick Game Educational Toys

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5G 10 waterproof sealed silicone grease faucet toy water gun cylinder O-ring silicone grease paste small package lubricating grease

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Science and Technology Small Production DIY Creative Teaching Science Experiment Student Small Invention Electric Jeep Off-road Vehicle Material Package

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Volcanic eruption first grade science experiment children's creative handmade small production volcanic mold shell science and education toys

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Silicone grease rubber plastic bridge machinery equipment grease moisture-proof rust-proof sealing insulation 5201295 silicone grease

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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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Montessori Math Educational Aids Wooden Number Computing Clip Beads Matching Game Number Cognition Matching Puzzle

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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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Friction starting science experimental materials science and technology small production children's stem maker education and training equipment

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Science and technology small production suspension blowing ball electric science experiment DIY teaching aids Primary School students manual work material package

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diy kindergarten Elementary School students' science and education toys scientific small production friction generation electric electrostatic experiment handmade materials

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Air pressure disc DBS DBK brake friction plate multi-point round RE old paper cutter brake pad

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Hand spray butter lubricating grease high temperature resistant door lock cylinder door hinge bearing gear abnormal noise anti-rust spray

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Homemade amphibious vehicle Wind boat technology small production materials small invention handmade technology waste utilization

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

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Science and technology small production homemade Periscope optical physics science experiment DIY assembled Periscope intelligence toys

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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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