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

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

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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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Primary school students science experiment material package suit 123456 grade gift box physics science and technology small production

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

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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Entry-level physical experiment equipment magnetic suspension train electromagnetic induction Lenz law Loren magnetic science teaching aids

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Children's Montessori Early Education Mathematics Learning Stick Color Cognitive Matching Board Wooden Stick Game Educational Toys

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Great Wall High Temperature Industrial Butter Shangbo Lithium-based Grease General Lithium-based Grease 0/1/2/3 Joint Grease

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Science and Technology small production student fun science experiment equipment three or four grade Bevel height adjustment object movement

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