About SHIMIZU TOORU
About 日立造船
About SUZUKI MOTOMITSU
About 日立造船
About TOJO CHIAKI
About 日立造船
About SHIMIZU YOSHIYUKI
About 日立造船
About NITTA KEIICHI
About 住友重機械工業
About SAITO TAKAYUKI
About 資源環境技総研
About submarine mining
About air lift
About Special minings
About Metal mines,mineral resources
About エアリフト
About 鉱
About 研究
About 開発