Yet another NC-123B was used being a radio relay plane over the Ho Chi Minh trail, with equipment to examine the signals from many sensors on the ground built to get enemy truck exercise.K?t qu? x? s? X? s? mi?n B?c X? s? mi?n Trung X? s? mi?n Nam Mega 645 Electric power 655 Ti?n ích m? r?ng S? k?t qu? S? k?t qu? MT S? k?t qu? MN Mã nhúng Quay t