! pipedum_53a.scl ! 225/224, 1728/1715, 4375/4374, Manuel Op de Coul, 2001 53 ! 50/49 36/35 25/24 200/189 15/14 27/25 54/49 10/9 9/8 8/7 125/108 7/6 25/21 6/5 60/49 100/81 5/4 80/63 9/7 35/27 250/189 4/3 27/20 48/35 25/18 7/5 10/7 36/25 72/49 40/27 3/2 32/21 54/35 14/9 100/63 8/5 81/50 288/175 5/3 27/16 12/7 125/72 7/4 25/14 9/5 90/49 50/27 15/8 40/21 27/14 35/18 125/63 2/1