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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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Scientific experiment diy bear climbing rope friction experiment steam technology small production small invention material package suit

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

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

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Industrial clutch brake friction plate

Industrial clutch brake friction plate

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

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

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Sweeping robot creative vacuum cleaner science experiment student science and technology small production small invention handmade material package

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Tree Climbing Panda Friction Rope Climbing Experiment Primary School Students' Science and Technology Small Production Children's Science Small Experiment Material Package

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

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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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Laser targeting device technology small production diy manual assembly model scientific teaching aids experimental device material package

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

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Xueyouma Portable Microscope Upgrade 3-in -1 Set Dual Light Source Experiment Microscopic Slide Specimen Toy

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Student Science experiment homemade time hourglass diy technology small production material package children's handmade invention steam

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Technology small production creative small invention DIY bear climbing rope physical experiment friction steam elementary school student toy

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Children's Water Garden diy chemistry Primary School students silicate sodium growth Stone Magic Stone science experiment toy

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

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Periscope Children's Science Experimental Toys Kindergarten Pupils Science and Technology Small Making Handmade Diy Invention Physics

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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 pole woodpecker science experiment package 7-14 years old primary school students friction physics experiment toy

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Free Shipping Creative Crown Rodent Pioneer Handbag Decompression Bag Silicone Toy Pioneer Messenger Bag Amazon

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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 STEM education maker handmade scientific experiment teaching aids diy assembly material package kit wholesale

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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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Caterpillar Butter Grease Butter Bomb Small Package Lithium Base Grease Bearing Engineering Machinery General Factory Outlet

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Primary School students science and technology production material bag DIY windmill puzzle handmade Ferris wheel bottle cap turning waste into treasure gift

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