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

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

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

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Middle school math area to travel together kindergarten corner area corner toy points digital cognitive cloth

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

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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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Homemade submarine diy science and technology small production scientific toys salvage shipwreck teaching experimental equipment teaching aids wholesale

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

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

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200 PCs mixed gear bag plastic transmission toy car robot DIY accessories small making plastic gear set

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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

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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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Science and Technology small production homemade water dispenser maker work steam science experiment toy elementary school student DIY material

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

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

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

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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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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 DIY assembly taxiing aircraft material package primary and secondary school students scientific experiment model a generation of hair

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Yaofish skate fish mountain and river tour geographical cognition puzzle board game thinking training travel map toy

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

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Science and technology small production diy material package small invention hand-made dehydrator dryer elementary school students scientific experiment

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