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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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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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Children's kindergarten Elementary School students physics science experiment small production small invention electrostatic friction electric electrostatic experiment

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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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stem science experiment toy hydraulic mechanical primary school student arm engineering series science and technology gift organization small production

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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 suspension blowing ball electric science experiment DIY teaching aids Primary School students manual work material package

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

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

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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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Friction power generation electric science experiment technology small production student handmade diy electrostatic material kindergarten teaching aids

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

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Microscope Mini small children's three-in-one multifunctional convenient educational toys

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

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63*45*15 circlip type slitting machine iron sheet brake pad DBG DBH air pressure disc brake friction plate

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Electric hammer grease impact drill gear maintenance oil power tool lubricating grease friction resistance long life manufacturers

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Elementary School student science experiment playing teaching aids wind car Children's handmade technology small production small invention diy material

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

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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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Air pressure disc DBS DBK brake friction plate multi-point round RE old paper cutter brake pad

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Plastic gear noise-canceling grease, anti-wear, high temperature resistance, friction resistance, strong adhesion, non-throwing oil manufacturers wholesale

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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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Portable Children's Microscope 180 Times High Definition Scientific Experiment Toy Set Xueyouma Cross-border Hot Selling Puzzle

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PP plastic bottle 50 ml roller ball bottle friction mosquito repellent, alcohol bottle cosmetics walking bead antiperspirant bottle packaging materials

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

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Kindergarten learning button zipper teaching aids button zipper toy non-woven area material homemade

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