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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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Science and Technology small production DIY small hole imaging handmade bag scientific experiment material STEM education puzzle science and education teaching aids

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

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7-14 years old children wooden science education learning wooden diy solar helicopter handmade model teaching supplies

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

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

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

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

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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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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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Industrial clutch brake friction plate

Industrial clutch brake friction plate

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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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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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DIY water wheel primary school students science and technology small production material package research and learning maker classroom energy conversion experimental equipment

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Primary and secondary school students physical teaching aids scientific material package DIY manual space solar photovoltaic power generation satellite model

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

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

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

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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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Science and Technology small production Boy's air-powered speedboat diy material Primary School student equipment stem science experiment toy

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

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Science Experiment DIY Wooden Hydraulic Lifting Platform Science and Technology Small Making Interesting Children's Handmade Popular Science Teaching Aware

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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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