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

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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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Radish Sword Net Carrot Knife Toy Set Knife Family Decompression Telescopic Set Toy Cross-border Sales

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Cross-border expansion bubble water capsule dinosaur animal water absorption small toy bubble large water absorption small capsule expansion toy hot sale

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Scientific experiment chemical material package baking soda citric acid sodium alginate calcium chloride effervescent tablets alum snow powder

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Science and technology small production invention Primary School students science experiment set steam manual work material tornado

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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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Kindergarten DIY Sewage Filtration Self-made Water Purifier Scientific Small Experiment Set Device System Material Purification Teaching Aware

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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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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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Science and technology small production DIY colorful full-color light circuit experimental toys electromagnetic induction science small experimental material package

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

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

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

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Green Dragon Island & Insects Catcher Board Game Children's Spatial Thinking Puzzle Exercise Children's Spatial Sense Educational Toys

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Ailunbao plastic gear silencer grease anti-wear, high temperature resistance, friction resistance, strong adhesion and no oil rejection

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Technology small production tornado beauty connector sand leakage experiment leakage connector with 200 ml special bottle

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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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Hand spray butter lubricating grease high temperature resistant door lock cylinder door hinge bearing gear abnormal noise anti-rust spray

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Industrial clutch brake friction plate

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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DIY Air Power Car Primary School Students' Science and Technology Small Production Assembled Toys Steam Popular Science Experiment Handmade Material Bag

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

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

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