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Small hole imaging device Creative Technology small production DIY light Student Manual science experiment device material wholesale

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

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DIY water wheel primary school students science and technology small production material package research and learning maker classroom energy conversion experimental equipment

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

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

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Children's science and technology small production DIY rubber band guitar handmade self-made scientific experiment invention educational teaching aids

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

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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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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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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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Science and Technology small production DIY water dispenser handmade homemade scientific experiment invention SETM educational educational educational supplies

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Silicone grease rubber plastic bridge machinery equipment grease moisture-proof rust-proof sealing insulation 5201295 silicone grease

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Crowdstone Technology Small Making Small Invention Children's Handmade Scientific Experiment Educational Toy Model Stone-throwing Chariot

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

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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 self-made Periscope Junior High School optical reflection experiment DIY light refraction propagation popular science model

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diy solar truck technology small production creative invention solar racing science experiment material package wholesale

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KT board student puzzle assembly tree climbing panda friction climbing rope experimental technology small production experimental material package

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

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7-14 years old children wooden science education learning wooden diy solar helicopter handmade model teaching supplies

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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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Science and Technology Small Production Mars Obstacle Avoidance Robot DIY Primary and Secondary School Physics steam Science Experiment Material Package Invention

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

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