The lengths of the arrows in the figure are proportional to the measured airspeeds, some of which are indicated in units of meters per speed.
(The lengths of the arrows in the figure; are; proportional to the measured airspeeds) (some of which; are indicated; L:in units of meters per speed)
The lengths of the arrows in the figure some of which
are are indicated
proportional to the measured airspeeds
L:in units of meters per speed