Meaning: たんこうn. (Kanji=単項) simplex, having only one part or element; of or pertaining to a telecommunications system that works in only one direction at a timen. (Kanji=探鉱) mineral explorationn. (Kanji=炭坑) coal mine, underground cave where workers dig for coaln. (Kanji=炭鉱) coal mine, underground cave where workers dig for coaln. (Kanji=鍛工) metal-worker, one who sculpts and molds metal objectsn. (Kanji=単行) independent action