The development of the acoustic transducer that converted converting electrical energy to sound waves enabled the rapid advances in SONAR design and technology during the last years of world war 1 (1 янв 1916 г. – 11 ноя 1918 г.)
Добавлено на ленту времени:
Дата:
1 янв 1916 г.
11 ноя 1918 г.
~ 2 years and 10 months