principal scale การใช้

To counter this, some meters include a mirror along the markings of the principal scale.
Thus, the tone becomes richer and fuller as the pipe's diameter widens from string scale to principal scale to flute scale.
When the principal scale is small, i . e . for a very fine foam, this dispersed medium can be considered as a type of colloid.
The scale is true ( k = 1 ) on the equator so that multiplying its length on a printed map by the inverse of the RF ( or principal scale ) gives the actual circumference of the Earth.