COMPARATIVE RESULTS OBTAINED FROM MILD STEEL, HIGH TENSILE STEEL, AND DUCOL STEEL FOR INFORMATION OF ADMIRAL Y. HIRAGA 静止画資料 1924 平賀譲デジタルアーカイブ | 柏図書館
PARTICULARS OF THREE QUALITIES OF STEEL WHICH WERE FORWARDED TO ADMIRAL Y. HIRAGA 静止画資料 1924 平賀譲デジタルアーカイブ | 柏図書館