About IIDA MITSUAKI
About 化技研
About NAKAYAMA YOSHIO
About 化技研
About MATSUNAGA TAKEHIRO
About 化技研
About USUBA KUNI
About 化技研
About KAKUDATE YOZO
About 化技研
About YOSHIDA MASATAKE
About 化技研
About TANAKA KATSUMI
About 化技研
About FUJIWARA SHUZO
About 化技研
About 化学技術研究所報告
About explosion
About trinitrotoluene
About Explosive industry in general
About 爆発音
About 実験