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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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Cross-border hot selling DIY assembled toys 13 in one self-installed solar toy car 13 in 1 intelligent robot

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Gear motor accessories 32mmX32mmX100mm billion large motor brake pad tool magazine motor friction plate

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Industrial clutch brake friction plate

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DIY Wind Vane Self-made Wind Meter Small Production DIY Science and Technology Science Experiment Hand-assembled Student Teaching Aids New Products

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Manufacturers supply punch mechanical friction block buffer layer press friction block high wear-resistant friction block production

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Crowdstone Technology Small Making Small Invention Children's Handmade Scientific Experiment Educational Toy Model Stone-throwing Chariot

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Scientific Experiment Obstacle Avoidance Car Robot Science and Technology Small Production Primary School Students DIY Manual Intelligent Experiment Small Invention

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

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

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

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Machine tool press punch friction plate round friction block brake block punch accessories

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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 Creative Teaching Science Experiment Student Small Invention Electric Jeep Off-road Vehicle Material Package

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

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DIY creative technology small production electric windmill house elementary school students educational science and education toys handmade work material package

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

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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

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Pupil Experimental Pigment 10ml Children's Science Experimental Color Hand Tone Slime Pigment DIY Material

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

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Bamboo people sixth grade handmade toy material diy small bamboo people double battle position Zhiyi game with pk table

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[Star River] cable-stayed bridge diy technology small production mechanics physics experiment school education training material package

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

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