Aeron.
an instrument that shows the rate of ascent or descent of an aircraft, operating on a differential pressure principle.
[ 1935-40 ]
Aeron.
an instrument that shows the rate of ascent or descent of an aircraft, operating on a differential pressure principle.
[ 1935-40 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012