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1) 38CrMoAlA(JIS SACM645)2) 42CrMo(JIS SCM440)1) 38CrMoAlA(JIS SACM645)2) 42CrMo(JIS SCM440)Perawatan nitritElectroplated hard-chrome rampungQuenching frekuensi dhuwurSemprotan lapisan bimetallicVakum quenching
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