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diy goggles put splash protection children chemical experiment glasses technology small production science experiment toy

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

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

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

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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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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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63*45*15 circlip type slitting machine iron sheet brake pad DBG DBH air pressure disc brake friction plate

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Children's kindergarten Elementary School students physics science experiment small production small invention electrostatic friction electric electrostatic experiment

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

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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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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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Friction electrification scientific experiment diy technology small production electrostatic demonstration material package steam Classroom Manual

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Friction experiment demonstrator material package trolley wheel labor-saving diy technology small production science classroom supporting

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

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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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Friction power generation electric science experiment technology small production student handmade diy electrostatic material kindergarten teaching aids

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Factory wholesale 295 silicone grease oily bridge support waterproof sealing industrial lubrication demoulding 5201 silicone grease

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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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Electric hammer grease impact drill gear maintenance oil power tool lubricating grease friction resistance long life manufacturers

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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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Exploration Boy Ancient Water Clock Pupil Science Experiment Toy Set DIY Handmade Science and Technology Small Production

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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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Battery, paint, storage box, bubble liquid science experiment diy technology small production material package

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

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