40.37164 a low frequenc em sourc signal 
92.00705 the time and/or frequenc shift
23.2763 the sourc signal
86.32625 the centerlin of a stationari p
68.800964 roller
66.69281 pipe wall thick without remov o
81.05842 pipe thick detect around obstru
21.37996 pipe inspect
85.737946 metal clad
68.1975 larger diamet pipe
44.12046 em
57.646797 an open ring
