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

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Pupils' Color Wooden Counting Stick Teaching Aids 100 8cm Bamboo Counting Stick Math Stick Children's Educational Toys

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Scientific experiment diy Magdeburg hemisphere experiment children's handmade technology small production school pressure physics teaching aids

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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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Industrial clutch brake friction plate

Industrial clutch brake friction plate

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

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

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

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

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

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Cross-border hot selling DIY assembled toys 13 in one self-installed solar toy car 13 in 1 intelligent robot

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Science and Technology small production homemade water dispenser maker work steam science experiment toy elementary school student DIY material

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

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

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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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Friction starting science experimental materials science and technology small production children's stem maker education and training equipment

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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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DIY Wind Vane Self-made Wind Meter Small Production DIY Science and Technology Science Experiment Hand-assembled Student Teaching Aids New Products

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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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8cm bamboo Primary School students color counting stick 100 children's toys arithmetic stick counting stick math stick learning tool

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

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

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Students 99 Multiplication Table Table Table Game Exercise Mind Mathematical Calculation Teaching Ads Parent-Child Interactive Educational Science and Education Toys

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