About YAMAMOTO MASAYUKI
About 山本科学工具研究社
About YAMAMOTO TAKASHI
About 山本科学工具研究社
About 日本熱処理技術協会講演大会講演概要集
About metallic material
About material testing
About indentation hardness
About indenter
About hardened steel
About cemented carbide
About comparative test
About standard specimen
About measurement error
About Rockwell hardness
About reference sample
About Material testing
About ロックウェル硬さ
About 試験
About 球圧
About 材質
About 比較試験