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

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Science and technology small production DIY assembly taxiing aircraft material package primary and secondary school students scientific experiment model a generation of hair

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

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

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Electromagnetic brake friction plate motor brake disc brake pad Mechanical accessories

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Science and Technology small production homemade water dispenser maker work steam science experiment toy elementary school student DIY material

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