REMOVAL OF ASH FROM AND AGGREGATION OF COAL
A Standard patent application filed on 12 November 1981 credited to Akimoto, Hidetoshi
;
Kaji, Ryuichi
;
Komuro, Takeo
;
Hishinuma, Yukio
;
Kikuchi, Hideo
;
Nakajima, Fumito
;
Terada, Hiroshi
;
Muranaka, Yasushi