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土田 恭義, 小野寺 善弘, 浅見 勉, 荒川 宗和, 鎌谷 弘志, 関口 博康, 望月 尭. "801 床下地表面硬さの簡易測定方法に関する研究 : その3 引掻き硬さ測定器の検討 ('97大会学術講演会プログラムと発表論文要旨)." Finex 9.53 (1997) 13