The audit found that iron, steel returned with a dark
and checked by measuring the hardness of the area found. Workpiece hardness than the
hardness of workpiece measurement is 40.3 ~ 50.6 HRC.
But hardness is measured at a different location, 30.1 - 31.8 HRC
, which is standard. The hardness of the standard is 25 ~ 32 HRC.
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