! pipedum_15c.scl ! 49/48, 126/125, 1029/1024, Paul Erlich, 2001 15 ! 21/20 160/147 8/7 6/5 5/4 64/49 48/35 35/24 49/32 8/5 5/3 7/4 147/80 40/21 2/1