DACON PA Ultrasonic ደረጃ ድርድር መመሪያዎች
DACON PA Ultrasonic Phased Array የአጠቃቀም መመሪያ Ultrasonic Phased Array በ 1959 መጀመሪያ ላይ ቶም ብራውን በኬልቪን እና ሂዩዝ ተጀመረ filed for a patent of an annular dynamically focussed transducer system. This system latterly became known as…