| 单词 | production of coal |
| 释义 | production of coal The railways, the production of coal, steel, and iron, the entire distribution of commodities are in reality, if not in law, public services. Times, Sunday Times In 1990 the production of coal was around 500,000 tons per year. Retrieved from Wikipedia CC BY-SA 3.0 The company has a portfolio of mineral rights on which it earns royalties from the production of coal, potash and other minerals. Retrieved from Wikipedia CC BY-SA 3.0 By 1897, production of coal in the region had risen to over 70,000 tons. Retrieved from Wikipedia CC BY-SA 3.0 Largely self-taught, he studied botany, learned several foreign languages, constructed a velocipede or early bicycle, and experimented with the production of coal gas. Retrieved from Wikipedia CC BY-SA 3.0 |
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