About YAMASHITA HIDETOSHI
About ハザマ 技研
About SAKAI KOJI
About 北海道開発庁 北海道開発局 開発土木研
About SAEKI NOBORU
About コンクリート工学論文集
About degradation (alteration)
About Glaciologic engineering,cold region construction
About Natural disasters
About 超音波伝播速度
About 凍害
About 推定