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 Jan 1916 Jahr – 11 Nov 1918 Jahr)
Zugefügt zum Band der Zeit:
Datum:
1 Jan 1916 Jahr
11 Nov 1918 Jahr
~ 2 years and 10 months