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Sven Petersson Sweden Local time: 10:03 Native speaker of: Swedish, English PRO pts in pair: 672
9 hrs confidence:
Explanation: as in Sven's example. The googles search came up with about the same amount for coarse as for course and the UNC given in the examples appear to be the same type. I suggest you check with a Danish "maskinfabrik".
Sorry Sven, I didn't check throughouly enough before disagreeing, had only checked my ref. books.