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Science and Technology small production GUI watch Japanese shadow length measurement 24 solar terms astronomical instrument handmade DIY children's teaching aids

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

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

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

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

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Electronic cannon DIY homemade technology small production handmade gun science and technology experiment science and education air pressure launch stem

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

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

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

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

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

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

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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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