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

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

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Science and technology small production STEM education maker handmade scientific experiment teaching aids diy assembly material package kit wholesale

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Montessori Math Educational Aids Wooden Number Computing Clip Beads Matching Game Number Cognition Matching Puzzle

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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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Maxwell rolling pendulum stem technology small production diy physical experiment gravity model popular science equipment wholesale

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Douyin popular 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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Children's scientific experiment pigment English label pigment material water-soluble pigment diy handmade Science and Technology small production

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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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Science and Technology Small Production DIY Creative Teaching Science Experiment Student Small Invention Electric Jeep Off-road Vehicle Material Package

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

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Science and Technology small production homemade fire alarm scientific experiment primary school student steam science and education circuit toy material

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Industrial clutch brake friction plate

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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 pole woodpecker science experiment package 7-14 years old primary school students friction physics experiment toy

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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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Electric fitness robot technology small production diy small invention handmade elliptical machine technology maker works

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Children's early education educational toys facial expression stickers changing felt puzzle non-woven handmade diy material package

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Kindergarten DIY Sewage Filtration Self-made Water Purifier Scientific Small Experiment Set Device System Material Purification Teaching Aware

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

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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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Science and technology small production homemade Periscope optical physics science experiment DIY assembled Periscope intelligence toys

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