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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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5G 10 waterproof sealed silicone grease faucet toy water gun cylinder O-ring silicone grease paste small package lubricating grease

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

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100ml magic water sprite solution magic water baby special pigment handmade ocean baby supplement

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

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

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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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Self-made Submarine Technology Small Handmade Scientific Experimental Equipment Ups and Downs Diving diy Teaching Aids Materials Toys

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

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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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Pupil Experimental Pigment 10ml Children's Science Experimental Color Hand Tone Slime Pigment 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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Science and Technology Small Production DIY Creative Teaching Science Experiment Student Small Invention Electric Jeep Off-road Vehicle Material Package

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

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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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Industrial clutch brake friction plate

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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

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

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

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