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鉱石うせきNounFreq #12085
1

ore; mineral; crystal

炭鉱炭坑んこうNounFreq #31704
1

coal mine; (coal) pit; colliery

Examples
あの支部は炭鉱労働組合に属している。
That branch is affiliated to the miners' union.
2

炭坑 only

coal-mine shaft

鉱業うぎょうNounFreq #78762
1

mining industry

鉱酸こうさんNounFreq #151584
1

Chemistry

mineral acid; inorganic acid