DF: the output or display is indicated by an index and graduated scale, one of which is fixed and the position of the other is a continuous function of the particular quantity being measured
DF: the output or display is indicated by an index and graduated scale, one of which is fixed and the position of the other is a continuous function of the particular quantity being measured
DF: the output or display is indicated by an index and graduated scale, one of which is fixed and the position of the other is a continuous function of the particular quantity being measured