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diy kindergarten Elementary School students' science and education toys scientific small production friction generation electric electrostatic experiment handmade materials

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

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

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

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

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

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

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Air pressure disc DBS DBK brake friction plate multi-point round RE old paper cutter brake pad

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

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

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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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DIY creative technology small production electric windmill house elementary school students educational science and education toys handmade work material package

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

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

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

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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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Technology small production tornado beauty connector sand leakage experiment leakage connector with 200 ml special bottle

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

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Bamboo people sixth grade handmade toy material diy small bamboo people double battle position Zhiyi game with pk table

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

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

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