About KAJI R
About Hitachi Ltd., Hitachi-shi
About MURANAKA Y
About Hitachi Ltd., Hitachi-shi
About OTSUKA K
About Hitachi Ltd., Hitachi-shi
About HISHINUMA Y
About Hitachi Ltd., Hitachi-shi
About coal
About Liquid fuel industry
About Properties,composition,analysis and test of coal and coke
About 石炭
About 水
About 細孔構造
About 酸素