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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

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

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

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

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

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

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

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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

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

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

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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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Super high temperature resistant grease high speed bearing mechanical wear-resistant Butter automobile industrial gear electric hammer factory wholesale

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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 Homemade Chemical Iodine Solution Experiment Making Toys Starch Secret Letter Primary School Students' Handmade diy Fun Material Bag

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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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