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

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

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Hand spray butter lubricant bearing gear grease anti-high temperature mechanical hinge door lock abnormal sound deep lubrication

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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

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

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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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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

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

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Ailunbao plastic gear silencer grease anti-wear, high temperature resistance, friction resistance, strong adhesion and no oil rejection

Ailunbao plastic gear silencer grease anti-wear, high temperature resistance, friction resistance, strong adhesion and no oil rejection

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Science experiment teaching aids for primary school students self-made water purifier filter water science and technology small production Steam science and education frontier

Science experiment teaching aids for primary school students self-made water purifier filter water science and technology small production Steam science and education frontier

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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

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 diy material package small invention hand-made dehydrator dryer elementary school students scientific experiment

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Student textbook diy lung capacity bag measuring simple lung capacity meter technology small production scientific experimental equipment

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

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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

Air pressure disc brake friction plate for printing machine paper cutter industrial machinery air pressure disc brake pad

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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

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

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