4. Measuring and testing
  5. Hardness
  6. By penetrator or indentor

Dong-il Kwon

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Apparatus for determining residual stress, method for...

Measuring and testing – Hardness – By penetrator or indentor
Reexamination Certificate

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Apparatus for indentation test and method for measuring...

Measuring and testing – Hardness – By penetrator or indentor
Reexamination Certificate

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