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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

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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Industrial clutch brake friction plate

Industrial clutch brake friction plate

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

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Science Experiment DIY Wooden Hydraulic Lifting Platform Science and Technology Small Making Interesting Children's Handmade Popular Science Teaching Aware

Science Experiment DIY Wooden Hydraulic Lifting Platform Science and Technology Small Making Interesting Children's Handmade Popular Science Teaching Aware

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

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

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DIY Human Blood Circulation Model Science and Technology Small Production Children's Small Invention Scientific Experiment stem Maker Material

DIY Human Blood Circulation Model Science and Technology Small Production Children's Small Invention Scientific Experiment stem Maker Material

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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 GUI watch Japanese shadow length measurement 24 solar terms astronomical instrument handmade DIY children's teaching aids

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

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Student Science and Technology Handmade DIY Telegraph Small Making Model Children's Maker Education STEM Scientific Experimental Materials

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

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

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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

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Scientific experiment diy climbing monkey physical friction technology small production student children handmade school 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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Air Purifier Technology Small Making DIY Handmade Scientific Experiment Equipment Student STEM Educational Toys

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

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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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Everest Kaiyue 500X brake pad 500F 525X 525F disc brake leather ZF500GY ZF500 brake friction

Everest Kaiyue 500X brake pad 500F 525X 525F disc brake leather ZF500GY ZF500 brake friction

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