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

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

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

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Silicone grease rubber plastic bridge machinery equipment grease moisture-proof rust-proof sealing insulation 5201295 silicone grease

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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 Boy's air-powered speedboat diy material Primary School student equipment stem science experiment toy

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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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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 GUI watch Japanese shadow length measurement 24 solar terms astronomical instrument handmade DIY children's teaching aids

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

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Science and Technology Small Production Mars Obstacle Avoidance Robot DIY Primary and Secondary School Physics steam Science Experiment Material Package Invention

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

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

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Scientific and Technological small production causes of DIY style experimental materials students' scientific and physical equipment teaching aids

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

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Air Purifier Technology Small Making DIY Handmade Scientific Experiment Equipment Student STEM Educational Toys

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Crowdstone Technology Small Making Small Invention Children's Handmade Scientific Experiment Educational Toy Model Stone-throwing Chariot

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Solar truck small experiment science small manual diy material experiment solar car Children's Day experiment package

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

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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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diy solar truck technology small production creative invention solar racing science experiment material package wholesale

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

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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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Pupil Experimental Pigment 10ml Children's Science Experimental Color Hand Tone Slime Pigment DIY Material

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Small hole imaging device Creative Technology small production DIY light Student Manual science experiment device material wholesale

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Children's Homemade Chemical Iodine Solution Experiment Making Toys Starch Secret Letter Primary School Students' Handmade diy Fun Material Bag

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KT board student puzzle assembly tree climbing panda friction climbing rope experimental technology small production experimental material package

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