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

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

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

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Air pressure disc brake friction plate for printing machine paper cutter industrial machinery air pressure disc brake pad

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

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Solar truck small experiment science small manual diy material experiment solar car Children's Day experiment package

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

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

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

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

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

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

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

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

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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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Friction starting science experimental materials science and technology small production children's stem maker education and training equipment

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

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Air Purifier Technology Small Making DIY Handmade Scientific Experiment Equipment Student STEM Educational Toys

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