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Revandi, Zulio (2024) Analisis Kekerasan dan Struktur Mikro Baja JIS Sup 9 Hasil Perlakuan Hardening Quenching Dengan Variasi Waktu Tahan dan Media Pendingin. (Analysis of Hardness and Micro Structure of JIS Sup 9 Steel Results of Hardening Quenching Treatment With Variations of Holding Time and Cooling Media). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.