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

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

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Spot Thailand PlanToys mini travel portable small iron box memory chess cactus game stick gyro blocks

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

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

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

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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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Children's Montessori Early Education Mathematics Learning Stick Color Cognitive Matching Board Wooden Stick Game Educational Toys

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Manufacturers supply punch mechanical friction block buffer layer press friction block high wear-resistant friction block production

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Polymer wear-resistant friction plate hexagon clutch brake pad motor brake accessories

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

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

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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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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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