There then follows separation V2 of a first raw sand fraction RS1, using a sifting device {HEAD ~ SE1}, which has {TAIL ~ a size} of hole in the range of, e.g., 10 12 mm 
has
There then follows separation V2 of a first raw sand fraction RS1 , using a sifting device { HEAD ~ SE1 } , which has { TAIL ~ a size } of hole in the range of , e.g. , 10 12 mm
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH