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

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

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Homemade flute DIY musical instrument vocal stem handmade music science experiment equipment technology small production experiment device

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10ml children science experiment pigment water soluble pigment Plasticine slime diy handmade soap colorant

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Self-made Submarine Technology Small Handmade Scientific Experimental Equipment Ups and Downs Diving diy Teaching Aids Materials Toys

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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 and Technological small production causes of DIY style experimental materials students' scientific and physical equipment teaching aids

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

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

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

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

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

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Scientific Experiment diy Friction Electrogeneration Material Package Electrostatic Demonstration Technology Small Production Student Children Handmade

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

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80*60*15 square 4-hole brake pad slitting machine rewinder brake friction plate

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Wholesale White Special Grease Mechanical Bearings Reduce Friction High Temperature Lubricant Metal Curing Lubrication

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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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800g keg general grease excavator loader butter construction machinery friction parts lubrication anti-rust

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

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Self-made dynamometer student spring scale technology small production tension device children's science small experiment material package teaching aids

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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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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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