About SAITO AKIHIKO
About 大同特殊鋼 技開研
About OGAWA MICHIHARU
About 大同特殊鋼 技開研
About TSUTSUI KAZUHISA
About 大同特殊鋼 技開研
About ENDO HIROSHI
About 大同特殊鋼 技開研
About YAHAGI SHIN'ICHIRO
About 大同特殊鋼 技開研
About electromagnetic wave absorption
About Noise in general
About Rubbers
About 電磁波吸収
About ゴムシート
About 開発