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 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.
This article is about the stringed musical instrument. For other uses, see Cello (disambiguation). The cello (/ËtÊÉloÊ/ CHEL-oh; plural cellos or celli) or violoncello (/ËvaÉªÉlÉnËtÊÉloÊ/ VY-É-lÉn-CHEL-oh; Italian pronunciation: [vjolonËtÊÉllo]) is a bowed string instrument with four strings tuned in perfect fifths. The strings from low to high are generally tuned to C2, G2, D3 and A3, an octave lower than the viola.
The cello's body dimensions compare with a typical violin body length of about 14 inches, and it has proportionally deeper ribs and a shorter neck than the violin. These larger dimensions and heavier strings help produce a more resonant, deeper tone and a louder sound.he cello is roughly the size of a small man or woman and its weight is considerable, making it quite a load to tote, especially when it is ensconced in a fiberglass or plastic carrying case. Its proportions pose a constant challenge to musicians on their way to or from a performance or on tour.