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

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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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DIY water wheel primary school students science and technology small production material package research and learning maker classroom energy conversion experimental equipment

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KT board student puzzle assembly tree climbing panda friction climbing rope experimental technology small production experimental material package

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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Student Science and Technology Handmade DIY Telegraph Small Making Model Children's Maker Education STEM Scientific Experimental Materials

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

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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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Solar truck small experiment science small manual diy material experiment solar car Children's Day experiment package

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

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Air Purifier Technology Small Making DIY Handmade Scientific Experiment Equipment Student STEM Educational Toys

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Small hole imaging device Creative Technology small production DIY light Student Manual science experiment device material wholesale

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

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

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Creative technology small production diy electric radar detector labor technology materials science experimental model stem toys

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

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

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