| http://www.w3.org/ns/prov#value | - These can optionally be connected upstream or downstream???as is indicated by the arrows for reference numerals 5, 6, 7, 13, 16 in the drawing???of the first comminution unit 4:For example, a unit 13 for separating impurities, such as sand and stones, may be provided downstream or upstream of the first comminution unit 4.
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