Jisho

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Noun
1. coal mine; (coal) pit; colliery
Noun
2. coal-mine shaftOnly applies to 炭坑
Wikipedia definition
3. Coal miningThe goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and since the 1880s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United States, United Kingdom, and South Africa, a coal mine and its structures are a "colliery". In Australia, "colliery" generally refers to an underground coal mine.
Read “Coal mining” on English Wikipedia
Read “炭鉱” on Japanese Wikipedia
Read “Coal mining” on DBpedia
Other forms
炭坑 【たんこう】炭礦 【たんこう】

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