Westfalia Dinnendahl Gröppel (WEDAG; formerly Eisenhütte Westfalia, R.W. Dinnendahl AG, and Fr. Gröppel, C. Lührigs Nachf) was a German mechanical engineering company founded in 1872. It was primarily known for manufacturing coal and water processing plants used in the mining industry. In 2001, the company merged to KHD Humboldt Wedag.
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