About KONO AKIO
About OTAKE MASAO
About MISHINA HIROSHI
About KANEKAMA UNGAN
About IWASE MASARU
About MORI MASAMI
About TADA TOSHIYUKI
About YAMAZAKI YASUSHI
About トライボロジスト
About pantograph
About Railway vehicle equipment
About 純銅
About 鋼
About 集電
About 摩耗特性