The French scale or French gauge system is commonly used to measure the size of a catheter. It is most often abbreviated as Fr, but can often be seen abbreviated as Fg, Ga, FR or F. It may also be abbreviated as CH or Ch (for Charriere, charriÃ¨re its). Inventor The french = size 3 times the diameter in. millimeters round catheter of 1 French has an external diameter of 1â3 mm, and therefore the diameter of a round catheter in millimetres can be determined by dividing the French size by 3: D (mm) = Fr / 3. or. Fr = D (mm) * 3. For example, if the French size is 9, the diameter is 3 mm.
The violin has the highest pitch range of all the string instruments. 5 people found this useful.
The Viola strings are C, G, D, and A strings, with A being the highest, and C being the lowest. The Viola is tuned one fifth lower than the violin, and the strings are tuned one fourth down from each other. The fact that the Viola plays in a lower range than the violin is exactly what attracts many of its players and fans. Viola strings tend to be thicker, requiring a faster bow tempo and more bow weight than violin strings. 4. Note Range