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Creative Technology Small Production Friction Experiment Brain Tiangong Primary School Kindergarten Science Experiment Toys Free Shipping

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Magic water elf water baby children's pearlescent solution toy suit diy handmade material toy

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Science and technology small production DIY colorful full-color light circuit experimental toys electromagnetic induction science small experimental material 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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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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Scientific Experiment Diy Thermometer Technology Small Production Interesting Material Package Kindergarten Children's Handmade Maker Teaching Aware

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

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diy handmade technology small production creative vacuum cleaner student scientific experiment invention handmade assembled teaching aids materials

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

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10ml children's scientific experiment food coloring diy handmade rubber color slime Crystal mud color pigment

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

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

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

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

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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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Hand spray butter lubricating grease high temperature resistant door lock cylinder door hinge bearing gear abnormal noise anti-rust spray

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