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

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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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Super high temperature resistant grease high speed bearing mechanical wear-resistant Butter automobile industrial gear electric hammer factory wholesale

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Everest Kaiyue 500X brake pad 500F 525X 525F disc brake leather ZF500GY ZF500 brake friction

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

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Students 99 Multiplication Table Table Table Game Exercise Mind Mathematical Calculation Teaching Ads Parent-Child Interactive Educational Science and Education Toys

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

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

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Spot Thailand PlanToys mini travel portable small iron box memory chess cactus game stick gyro blocks

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

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

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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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Climbing monkey friction experiment diy technology small production material package kindergarten popular science hand-assembled educational toys

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

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

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Industrial clutch brake friction plate

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

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

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

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

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Cross-border hot selling DIY assembled toys 13 in one self-installed solar toy car 13 in 1 intelligent robot

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

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