About YOKOTA TOMOYUKI
About 日本鋼管 総合材料技研
About SHIRAKAMI TETSUO
About 日本鋼管 総合材料技研
About MIZOGUCHI SHIGERU
About 高周波熱錬
About YAMASHITA EIJI
About 高周波熱錬
About 材料とプロセス
About high strength steel
About Mechanical properties
About Transformation structures,work structures
About Si
About 高強度
About PC鋼棒
About 延性
About 組織因子
About 高強度鋼
About 高延性