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    #wire spring

    #general wire

    #spring wire

    #en19 material hardness in hrc

    #ck45 mechanical properties

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    #4140 quenched and tempered

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    #sts370

    #stkm 12b

    #scm415 chemical composition

    #scm435

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    #what is sk7 steel

    #sus420j2

    #sk5 steel

    #sus301

    #sk5 steel properties

    #s45c material

    #canon hp

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    #led 有機el 違い

    #カネカ

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    #キヤノンマシナリー

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    #canon 企業理念

    #マシナリー

    #machinery products

    #キヤノントッキ株式会社

    #有機el 仕組み

    #キヤノン 採用