! pipedum_27d.scl ! 2401/2400, 126/125, 64/63, Paul Erlich, 2001 27 ! 50/49 21/20 15/14 10/9 8/7 7/6 6/5 49/40 5/4 9/7 4/3 200/147 7/5 10/7 147/100 3/2 14/9 8/5 80/49 5/3 12/7 7/4 9/5 28/15 40/21 49/25 2/1