長壁式採炭 ちょうへきしきさいたん Meanings Noun longwall mining Kanji 長 long. Read as チョウ. 壁 wall. Read as ヘキ. 式 form. Read as シキ. 採 pick. Read as サイ. 炭 carbon. Read as タン. Word lists Mining Jinuma: Japanese Dictionary · Word lists