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

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

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diy technology small production new homemade flute children's production science and education toys early education kindergarten science popularization

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Science experiment teaching aids for primary school students self-made water purifier filter water science and technology small production Steam science and education frontier

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Science and technology small production of eight planets Solar System eight planets model universe model celestial instrument

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

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Scientific experiment sound wave imager technology small production primary school students can see the sound of manual assembly model

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

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Cross-border wooden children's educational early teaching aids analog electronic switching power supply LED light busy board busy light toys

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

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Self-made slide projector student science and technology small production DIY handmade maker science experiment model equipment teaching aids

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

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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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Air pressure disc brake friction plate for printing machine paper cutter industrial machinery air pressure disc brake pad

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

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

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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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Children's Garbage Sorting Game Brainstorming Battle Early Childhood Education for Boys and Girls Desktop Trash Bin Kindergarten Teaching Aids

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Simulation traffic light toy live voice broadcast traffic lights little boy early education sound and light toy ornaments

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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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Tiktok new radish telescope 8 Times single tube 3-section telescopic adjustable focus children's educational science and education boys and girls toys

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

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

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

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