Report - untuk Sekolah Menengah KejuruanB. Batu Asah/Batu Gerinda 303 1. Jenis-Jenis Butir Asahan (Abrasive) 304 2. Ukuran Butiran Asah 305 3. Tingkat Kekerasan (Grade) 305 4. Macam-Macam Perekat

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